26 files changed, 475 insertions, 783 deletions

diff --git a/arch/xtensa/kernel/asm-offsets.c b/arch/xtensa/kernel/asm-offsets.c
index 698079b3a336..d0323cd6a2ea 100644
--- a/arch/xtensa/kernel/asm-offsets.c
+++ b/arch/xtensa/kernel/asm-offsets.c
@@ -39,6 +39,7 @@ int main(void)
         DEFINE(PT_LEND, offsetof (struct pt_regs, lend));
         DEFINE(PT_LCOUNT, offsetof (struct pt_regs, lcount));
         DEFINE(PT_SAR, offsetof (struct pt_regs, sar));
+        DEFINE(PT_ICOUNTLEVEL, offsetof (struct pt_regs, icountlevel));
         DEFINE(PT_SYSCALL, offsetof (struct pt_regs, syscall));
         DEFINE(PT_AREG, offsetof (struct pt_regs, areg[0]));
         DEFINE(PT_AREG0, offsetof (struct pt_regs, areg[0]));
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index 9e271ba009bf..8dc7a2c26ff9 100644
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -125,8 +125,9 @@ _user_exception:
 
         movi    a2, 0
         rsr     a3, SAR
-        wsr     a2, ICOUNTLEVEL
+        xsr     a2, ICOUNTLEVEL
         s32i    a3, a1, PT_SAR
+        s32i    a2, a1, PT_ICOUNTLEVEL
 
         /* Rotate ws so that the current windowbase is at bit0. */
         /* Assume ws = xxwww1yyyy. Rotate ws right, so that a2 = yyyyxxwww1 */
@@ -276,8 +277,9 @@ _kernel_exception:
 
         movi    a2, 0
         rsr     a3, SAR
-        wsr     a2, ICOUNTLEVEL
+        xsr     a2, ICOUNTLEVEL
         s32i    a3, a1, PT_SAR
+        s32i    a2, a1, PT_ICOUNTLEVEL
 
         /* Rotate ws so that the current windowbase is at bit0. */
         /* Assume ws = xxwww1yyyy. Rotate ws right, so that a2 = yyyyxxwww1 */
@@ -330,14 +332,16 @@ _kernel_exception:
 
 common_exception:
 
-        /* Save EXCVADDR, DEBUGCAUSE, and PC, and clear LCOUNT */
+        /* Save some registers, disable loops and clear the syscall flag. */
 
         rsr     a2, DEBUGCAUSE
         rsr     a3, EPC_1
         s32i    a2, a1, PT_DEBUGCAUSE
         s32i    a3, a1, PT_PC
 
+        movi    a2, -1
         rsr     a3, EXCVADDR
+        s32i    a2, a1, PT_SYSCALL
         movi    a2, 0
         s32i    a3, a1, PT_EXCVADDR
         xsr     a2, LCOUNT
@@ -450,27 +454,8 @@ common_exception_return:
 
         /* Restore the state of the task and return from the exception. */
 
-
-        /* If we are returning from a user exception, and the process
-         * to run next has PT_SINGLESTEP set, we want to setup
-         * ICOUNT and ICOUNTLEVEL to step one instruction.
-         * PT_SINGLESTEP is set by sys_ptrace (ptrace.c)
-         */
-
 4:      /* a2 holds GET_CURRENT(a2,a1)  */
 
-        l32i    a3, a2, TI_TASK
-        l32i    a3, a3, TASK_PTRACE
-        bbci.l  a3, PT_SINGLESTEP_BIT, 1f # jump if single-step flag is not set
-
-        movi    a3, -2                  # PT_SINGLESTEP flag is set,
-        movi    a4, 1                   # icountlevel of 1 means it won't
-        wsr     a3, ICOUNT              # start counting until after rfe
-        wsr     a4, ICOUNTLEVEL         # so setup icount & icountlevel.
-        isync
-
-1:
-
 #if XCHAL_EXTRA_SA_SIZE
 
         /* For user exceptions, restore the extra state from the user's TCB. */
@@ -665,6 +650,13 @@ common_exception_exit:
         wsr     a3, LEND
         wsr     a2, LCOUNT
 
+        /* We control single stepping through the ICOUNTLEVEL register. */
+
+        l32i    a2, a1, PT_ICOUNTLEVEL
+        movi    a3, -2
+        wsr     a2, ICOUNTLEVEL
+        wsr     a3, ICOUNT
+
         /* Check if it was double exception. */
 
         l32i    a0, a1, PT_DEPC
diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S
index ea89910efa44..67e69139520b 100644
--- a/arch/xtensa/kernel/head.S
+++ b/arch/xtensa/kernel/head.S
@@ -19,6 +19,8 @@
 #include <asm/page.h>
 #include <asm/cacheasm.h>
 
+#include <linux/linkage.h>
+
 /*
  * This module contains the entry code for kernel images. It performs the
  * minimal setup needed to call the generic C routines.
@@ -227,13 +229,14 @@ _startup:
 should_never_return:
         j       should_never_return
 
-        /* Define some common data structures here.  We define them
-         * here in this assembly file due to their unusual alignment
-         * requirements.
-         */
 
-        .comm   swapper_pg_dir,PAGE_SIZE,PAGE_SIZE
-        .comm   empty_bad_page_table,PAGE_SIZE,PAGE_SIZE
-        .comm   empty_bad_page,PAGE_SIZE,PAGE_SIZE
-        .comm   empty_zero_page,PAGE_SIZE,PAGE_SIZE
+/*
+ * BSS section
+ */
+        
+.section ".bss.page_aligned", "w"
+ENTRY(swapper_pg_dir)
+        .fill   PAGE_SIZE, 1, 0
+ENTRY(empty_zero_page)
+        .fill   PAGE_SIZE, 1, 0
 
diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c
index 45571ccb72d6..77deae5290f0 100644
--- a/arch/xtensa/kernel/pci.c
+++ b/arch/xtensa/kernel/pci.c
@@ -401,7 +401,7 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
  * Also, think for a moment about likes of floppy.c that
  * include architecture specific parts. They may want to redefine ins/outs.
  *
- * We do not use horroble macroses here because we want to
+ * We do not use horrible macros here because we want to
  * advance pointer by sizeof(size).
  */
 void outsb(unsigned long addr, const void *src, unsigned long count) {
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 1ecf6716c327..2e8d398cf196 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -41,6 +41,7 @@
 #include <asm/platform.h>
 #include <asm/page.h>
 #include <asm/setup.h>
+#include <asm/param.h>
 
 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
 struct screen_info screen_info = { 0, 24, 0, 0, 0, 80, 0, 0, 0, 24, 1, 16};
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
index 58107672a619..033aae0336d2 100644
--- a/arch/xtensa/kernel/signal.c
+++ b/arch/xtensa/kernel/signal.c
@@ -1,397 +1,239 @@
-// TODO coprocessor stuff
 /*
- *  linux/arch/xtensa/kernel/signal.c
+ * arch/xtensa/kernel/signal.c
  *
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *  1997-11-28  Modified for POSIX.1b signals by Richard Henderson
- *
- *  Joe Taylor <joe@tensilica.com>
- *  Chris Zankel <chris@zankel.net>
+ * Default platform functions.
  *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
  *
+ * Copyright (C) 2005, 2006 Tensilica Inc.
+ * Copyright (C) 1991, 1992  Linus Torvalds
+ * 1997-11-28  Modified for POSIX.1b signals by Richard Henderson
  *
+ * Chris Zankel <chris@zankel.net>
+ * Joe Taylor <joe@tensilica.com>
  */
 
-#include <asm/variant/core.h>
-#include <asm/coprocessor.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/kernel.h>
 #include <linux/signal.h>
 #include <linux/errno.h>
-#include <linux/wait.h>
 #include <linux/ptrace.h>
-#include <linux/unistd.h>
-#include <linux/stddef.h>
 #include <linux/personality.h>
+#include <linux/freezer.h>
+
 #include <asm/ucontext.h>
 #include <asm/uaccess.h>
-#include <asm/pgtable.h>
 #include <asm/cacheflush.h>
+#include <asm/coprocessor.h>
+#include <asm/unistd.h>
 
 #define DEBUG_SIG  0
 
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
-asmlinkage long sys_wait4(pid_t pid,unsigned int * stat_addr, int options,
-                          struct rusage * ru);
 asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
 
 extern struct task_struct *coproc_owners[];
 
+extern void release_all_cp (struct task_struct *);
 
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
+struct rt_sigframe
+{
+        struct siginfo info;
+        struct ucontext uc;
+        cp_state_t cpstate;
+        unsigned char retcode[6];
+        unsigned int window[4];
+};
+
+/* 
+ * Flush register windows stored in pt_regs to stack.
+ * Returns 1 for errors.
+ *
+ * Note that windowbase, windowstart, and wmask are not updated!
  */
 
-int xtensa_sigsuspend(struct pt_regs *regs)
+int
+flush_window_regs_user(struct pt_regs *regs)
 {
-        old_sigset_t mask = (old_sigset_t) regs->areg[3];
-        sigset_t saveset;
+        const unsigned long ws = regs->windowstart;
+        const unsigned long wb = regs->windowbase;
+        unsigned long sp = 0;
+        unsigned long wm;
+        int err = 1;
+        int base;
 
-        mask &= _BLOCKABLE;
-        spin_lock_irq(&current->sighand->siglock);
-        saveset = current->blocked;
-        siginitset(&current->blocked, mask);
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
+        /* Return if no other frames. */
 
-        regs->areg[2] = -EINTR;
-        while (1) {
-                current->state = TASK_INTERRUPTIBLE;
-                schedule();
-                if (do_signal(regs, &saveset))
-                        return -EINTR;
-        }
-}
+        if (regs->wmask == 1)
+                return 0;
 
-asmlinkage int
-xtensa_rt_sigsuspend(struct pt_regs *regs)
-{
-        sigset_t *unewset = (sigset_t *) regs->areg[4];
-        size_t sigsetsize = (size_t) regs->areg[3];
-        sigset_t saveset, newset;
-        /* XXX: Don't preclude handling different sized sigset_t's.  */
-        if (sigsetsize != sizeof(sigset_t))
-                return -EINVAL;
+        /* Rotate windowmask and skip empty frames. */
 
-        if (copy_from_user(&newset, unewset, sizeof(newset)))
-                return -EFAULT;
-        sigdelsetmask(&newset, ~_BLOCKABLE);
-        spin_lock_irq(&current->sighand->siglock);
-        saveset = current->blocked;
-        current->blocked = newset;
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
+        wm = (ws >> wb) | (ws << (XCHAL_NUM_AREGS / 4 - wb));
+        base = (XCHAL_NUM_AREGS / 4) - (regs->wmask >> 4);
+                
+        /* For call8 or call12 frames, we need the previous stack pointer. */
 
-        regs->areg[2] = -EINTR;
-        while (1) {
-                current->state = TASK_INTERRUPTIBLE;
-                schedule();
-                if (do_signal(regs, &saveset))
-                        return -EINTR;
-        }
-}
+        if ((regs->wmask & 2) == 0)
+                if (__get_user(sp, (int*)(regs->areg[base * 4 + 1] - 12)))
+                        goto errout;
 
-asmlinkage int
-xtensa_sigaction(int sig, const struct old_sigaction *act,
-              struct old_sigaction *oact)
-{
-        struct k_sigaction new_ka, old_ka;
-        int ret;
+        /* Spill frames to stack. */
 
-        if (act) {
-                old_sigset_t mask;
-                if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-                    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-                    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
-                        return -EFAULT;
-                __get_user(new_ka.sa.sa_flags, &act->sa_flags);
-                __get_user(mask, &act->sa_mask);
-                siginitset(&new_ka.sa.sa_mask, mask);
-        }
+        while (base < XCHAL_NUM_AREGS / 4) {
 
-        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+                int m = (wm >> base);
+                int inc = 0;
 
-        if (!ret && oact) {
-                if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-                    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-                    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
-                        return -EFAULT;
-                __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
-                __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
-        }
+                /* Save registers a4..a7 (call8) or a4...a11 (call12) */
 
-        return ret;
-}
+                if (m & 2) {                    /* call4 */
+                        inc = 1;
 
-asmlinkage int
-xtensa_sigaltstack(struct pt_regs *regs)
-{
-        const stack_t *uss = (stack_t *) regs->areg[4];
-        stack_t *uoss = (stack_t *) regs->areg[3];
+                } else if (m & 4) {             /* call8 */
+                        if (copy_to_user((void*)(sp - 32),
+                                           &regs->areg[(base + 1) * 4], 16))
+                                goto errout;
+                        inc = 2;
 
-        if (regs->depc > 64)
-                panic ("Double exception sys_sigreturn\n");
+                } else if (m & 8) {     /* call12 */
+                        if (copy_to_user((void*)(sp - 48),
+                                           &regs->areg[(base + 1) * 4], 32))
+                                goto errout;
+                        inc = 3;
+                }
 
+                /* Save current frame a0..a3 under next SP */
 
-        return do_sigaltstack(uss, uoss, regs->areg[1]);
-}
+                sp = regs->areg[((base + inc) * 4 + 1) % XCHAL_NUM_AREGS];
+                if (copy_to_user((void*)(sp - 16), &regs->areg[base * 4], 16))
+                        goto errout;
+
+                /* Get current stack pointer for next loop iteration. */
+
+                sp = regs->areg[base * 4 + 1];
+                base += inc;
+        }
+
+        return 0;
 
+errout:
+        return err;
+}
 
 /*
- * Do a signal return; undo the signal stack.
+ * Note: We don't copy double exception 'regs', we have to finish double exc. 
+ * first before we return to signal handler! This dbl.exc.handler might cause 
+ * another double exception, but I think we are fine as the situation is the 
+ * same as if we had returned to the signal handerl and got an interrupt 
+ * immediately...
  */
 
-struct sigframe
-{
-        struct sigcontext sc;
-        struct _cpstate cpstate;
-        unsigned long extramask[_NSIG_WORDS-1];
-        unsigned char retcode[6];
-        unsigned int reserved[4]; /* Reserved area for chaining */
-        unsigned int window[4]; /* Window of 4 registers for initial context */
-};
-
-struct rt_sigframe
+static int
+setup_sigcontext(struct sigcontext __user *sc, cp_state_t *cpstate,
+                 struct pt_regs *regs, unsigned long mask)
 {
-        struct siginfo info;
-        struct ucontext uc;
-        struct _cpstate cpstate;
-        unsigned char retcode[6];
-        unsigned int reserved[4]; /* Reserved area for chaining */
-        unsigned int window[4]; /* Window of 4 registers for initial context */
-};
+        int err = 0;
 
-extern void release_all_cp (struct task_struct *);
+#define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
+        COPY(pc);
+        COPY(ps);
+        COPY(lbeg);
+        COPY(lend);
+        COPY(lcount);
+        COPY(sar);
+#undef COPY
 
+        err |= flush_window_regs_user(regs);
+        err |= __copy_to_user (sc->sc_a, regs->areg, 16 * 4);
 
-// FIXME restore_cpextra
-static inline int
-restore_cpextra (struct _cpstate *buf)
-{
-#if 0
-        /* The signal handler may have used coprocessors in which
-         * case they are still enabled.  We disable them to force a
-         * reloading of the original task's CP state by the lazy
-         * context-switching mechanisms of CP exception handling.
-         * Also, we essentially discard any coprocessor state that the
-         * signal handler created. */
+        // err |= __copy_to_user (sc->sc_a, regs->areg, XCHAL_NUM_AREGS * 4)
 
-        struct task_struct *tsk = current;
-        release_all_cp(tsk);
-        return __copy_from_user(tsk->thread.cpextra, buf, XTENSA_CP_EXTRA_SIZE);
+#if XCHAL_HAVE_CP
+# error Coprocessors unsupported
+        err |= save_cpextra(cpstate);
+        err |= __put_user(err ? NULL : cpstate, &sc->sc_cpstate);
 #endif
-        return 0;
-}
-
-/* Note: We don't copy double exception 'tregs', we have to finish double exc. first before we return to signal handler! This dbl.exc.handler might cause another double exception, but I think we are fine as the situation is the same as if we had returned to the signal handerl and got an interrupt immediately...
- */
+        /* non-iBCS2 extensions.. */
+        err |= __put_user(mask, &sc->oldmask);
 
+        return err;
+}
 
 static int
-restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
+restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
 {
-        struct thread_struct *thread;
         unsigned int err = 0;
         unsigned long ps;
-        struct _cpstate *buf;
 
 #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
         COPY(pc);
-        COPY(depc);
-        COPY(wmask);
         COPY(lbeg);
         COPY(lend);
         COPY(lcount);
         COPY(sar);
-        COPY(windowbase);
-        COPY(windowstart);
 #undef COPY
 
+        /* All registers were flushed to stack. Start with a prestine frame. */
+
+        regs->wmask = 1;
+        regs->windowbase = 0;
+        regs->windowstart = 1;
+
         /* For PS, restore only PS.CALLINC.
          * Assume that all other bits are either the same as for the signal
          * handler, or the user mode value doesn't matter (e.g. PS.OWB).
          */
         err |= __get_user(ps, &sc->sc_ps);
-        regs->ps = (regs->ps & ~PS_CALLINC_MASK)
-                | (ps & PS_CALLINC_MASK);
+        regs->ps = (regs->ps & ~PS_CALLINC_MASK) | (ps & PS_CALLINC_MASK);
 
         /* Additional corruption checks */
 
-        if ((regs->windowbase >= (XCHAL_NUM_AREGS/4))
-        || ((regs->windowstart & ~((1<<(XCHAL_NUM_AREGS/4)) - 1)) != 0) )
-                err = 1;
         if ((regs->lcount > 0)
-        && ((regs->lbeg > TASK_SIZE) || (regs->lend > TASK_SIZE)) )
+            && ((regs->lbeg > TASK_SIZE) || (regs->lend > TASK_SIZE)) )
                 err = 1;
 
-        /* Restore extended register state.
-         * See struct thread_struct in processor.h.
-         */
-        thread = &current->thread;
-
-        err |= __copy_from_user (regs->areg, sc->sc_areg, XCHAL_NUM_AREGS*4);
-        err |= __get_user(buf, &sc->sc_cpstate);
-        if (buf) {
-                if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
-                        goto badframe;
-                err |= restore_cpextra(buf);
-        }
-
-        regs->syscall = -1;             /* disable syscall checks */
-        return err;
-
-badframe:
-        return 1;
-}
-
-static inline void
-flush_my_cpstate(struct task_struct *tsk)
-{
-        unsigned long flags;
-        local_irq_save(flags);
-
-#if 0   // FIXME
-        for (i = 0; i < XCHAL_CP_NUM; i++) {
-                if (tsk == coproc_owners[i]) {
-                        xthal_validate_cp(i);
-                        xthal_save_cpregs(tsk->thread.cpregs_ptr[i], i);
+        err |= __copy_from_user(regs->areg, sc->sc_a, 16 * 4);
 
-                        /* Invalidate and "disown" the cp to allow
-                         * callers the chance to reset cp state in the
-                         * task_struct. */
+#if XCHAL_HAVE_CP
+# error Coprocessors unsupported
+        /* The signal handler may have used coprocessors in which
+         * case they are still enabled.  We disable them to force a
+         * reloading of the original task's CP state by the lazy
+         * context-switching mechanisms of CP exception handling.
+         * Also, we essentially discard any coprocessor state that the
+         * signal handler created. */
 
-                        xthal_invalidate_cp(i);
-                        coproc_owners[i] = 0;
-                }
+        if (!err) {
+          struct task_struct *tsk = current;
+          release_all_cp(tsk);
+          err |= __copy_from_user(tsk->thread.cpextra, sc->sc_cpstate, 
+                                  XTENSA_CP_EXTRA_SIZE);
         }
 #endif
-        local_irq_restore(flags);
-}
-
-/* Return codes:
-        0:  nothing saved
-        1:  stuff to save, successful
-       -1:  stuff to save, error happened
-*/
-static int
-save_cpextra (struct _cpstate *buf)
-{
-#if XCHAL_CP_NUM == 0
-        return 0;
-#else
-
-        /* FIXME: If a task has never used a coprocessor, there is
-         * no need to save and restore anything.  Tracking this
-         * information would allow us to optimize this section.
-         * Perhaps we can use current->used_math or (current->flags &
-         * PF_USEDFPU) or define a new field in the thread
-         * structure. */
-
-        /* We flush any live, task-owned cp state to the task_struct,
-         * then copy it all to the sigframe.  Then we clear all
-         * cp/extra state in the task_struct, effectively
-         * clearing/resetting all cp/extra state for the signal
-         * handler (cp-exception handling will load these new values
-         * into the cp/extra registers.)  This step is important for
-         * things like a floating-point cp, where the OS must reset
-         * the FCR to the default rounding mode. */
-
-        int err = 0;
-        struct task_struct *tsk = current;
-
-        flush_my_cpstate(tsk);
-        /* Note that we just copy everything: 'extra' and 'cp' state together.*/
-        err |= __copy_to_user(buf, tsk->thread.cp_save, XTENSA_CP_EXTRA_SIZE);
-        memset(tsk->thread.cp_save, 0, XTENSA_CP_EXTRA_SIZE);
-
-#if (XTENSA_CP_EXTRA_SIZE == 0)
-#error Sanity check on memset above, cpextra_size should not be zero.
-#endif
-
-        return err ? -1 : 1;
-#endif
-}
-
-static int
-setup_sigcontext(struct sigcontext *sc, struct _cpstate *cpstate,
-                 struct pt_regs *regs, unsigned long mask)
-{
-        struct thread_struct *thread;
-        int err = 0;
-
-//printk("setup_sigcontext\n");
-#define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
-        COPY(pc);
-        COPY(ps);
-        COPY(depc);
-        COPY(wmask);
-        COPY(lbeg);
-        COPY(lend);
-        COPY(lcount);
-        COPY(sar);
-        COPY(windowbase);
-        COPY(windowstart);
-#undef COPY
-
-        /* Save extended register state.
-         * See struct thread_struct in processor.h.
-         */
-        thread = &current->thread;
-        err |= __copy_to_user (sc->sc_areg, regs->areg, XCHAL_NUM_AREGS * 4);
-        err |= save_cpextra(cpstate);
-        err |= __put_user(err ? NULL : cpstate, &sc->sc_cpstate);
-        /* non-iBCS2 extensions.. */
-        err |= __put_user(mask, &sc->oldmask);
 
+        regs->syscall = -1;             /* disable syscall checks */
         return err;
 }
 
-asmlinkage int xtensa_sigreturn(struct pt_regs *regs)
-{
-        struct sigframe *frame = (struct sigframe *)regs->areg[1];
-        sigset_t set;
-        if (regs->depc > 64)
-                panic ("Double exception sys_sigreturn\n");
-
-        if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-                goto badframe;
-
-        if (__get_user(set.sig[0], &frame->sc.oldmask)
-            || (_NSIG_WORDS > 1
-                && __copy_from_user(&set.sig[1], &frame->extramask,
-                                    sizeof(frame->extramask))))
-                goto badframe;
-
-        sigdelsetmask(&set, ~_BLOCKABLE);
-
-        spin_lock_irq(&current->sighand->siglock);
-        current->blocked = set;
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
 
-        if (restore_sigcontext(regs, &frame->sc))
-                goto badframe;
-        return regs->areg[2];
 
-badframe:
-        force_sig(SIGSEGV, current);
-        return 0;
-}
+/*
+ * Do a signal return; undo the signal stack.
+ */
 
-asmlinkage int xtensa_rt_sigreturn(struct pt_regs *regs)
+asmlinkage long xtensa_rt_sigreturn(long a0, long a1, long a2, long a3,
+                                    long a4, long a5, struct pt_regs *regs)
 {
-        struct rt_sigframe *frame = (struct rt_sigframe *)regs->areg[1];
+        struct rt_sigframe __user *frame;
         sigset_t set;
-        stack_t st;
         int ret;
+
         if (regs->depc > 64)
-        {
-                printk("!!!!!!! DEPC !!!!!!!\n");
-                return 0;
-        }
+                panic("rt_sigreturn in double exception!\n");
+
+        frame = (struct rt_sigframe __user *) regs->areg[1];
 
         if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
                 goto badframe;
@@ -407,13 +249,11 @@ asmlinkage int xtensa_rt_sigreturn(struct pt_regs *regs)
 
         if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
                 goto badframe;
+
         ret = regs->areg[2];
 
-        if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
+        if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->areg[1]) == -EFAULT)
                 goto badframe;
-        /* It is more difficult to avoid calling this function than to
-           call it and ignore errors.  */
-        do_sigaltstack(&st, NULL, regs->areg[1]);
 
         return ret;
 
@@ -422,77 +262,50 @@ badframe:
         return 0;
 }
 
-/*
- * Set up a signal frame.
- */
+
 
 /*
- * Determine which stack to use..
+ * Set up a signal frame.
  */
-static inline void *
-get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
-{
-        if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! sas_ss_flags(sp))
-                sp = current->sas_ss_sp + current->sas_ss_size;
-
-        return (void *)((sp - frame_size) & -16ul);
-}
-
-#define USE_SIGRETURN           0
-#define USE_RT_SIGRETURN        1
 
 static int
-gen_return_code(unsigned char *codemem, unsigned int use_rt_sigreturn)
+gen_return_code(unsigned char *codemem)
 {
-        unsigned int retcall;
         int err = 0;
 
-#if 0
-        /* Ignoring SA_RESTORER for now; it's supposed to be obsolete,
-         * and the xtensa glibc doesn't use it.
+        /*
+         * The 12-bit immediate is really split up within the 24-bit MOVI
+         * instruction.  As long as the above system call numbers fit within
+         * 8-bits, the following code works fine. See the Xtensa ISA for
+         * details.
          */
-        if (ka->sa.sa_flags & SA_RESTORER) {
-                regs->pr = (unsigned long) ka->sa.sa_restorer;
-        } else
-#endif /* 0 */
-        {
-
-#if (__NR_sigreturn > 255) || (__NR_rt_sigreturn > 255)
-
-/* The 12-bit immediate is really split up within the 24-bit MOVI
- * instruction.  As long as the above system call numbers fit within
- * 8-bits, the following code works fine. See the Xtensa ISA for
- * details.
- */
 
-#error Generating the MOVI instruction below breaks!
+#if __NR_rt_sigreturn > 255
+# error Generating the MOVI instruction below breaks!
 #endif
 
-                retcall = use_rt_sigreturn ? __NR_rt_sigreturn : __NR_sigreturn;
-
 #ifdef __XTENSA_EB__   /* Big Endian version */
-                /* Generate instruction:  MOVI a2, retcall */
-                err |= __put_user(0x22, &codemem[0]);
-                err |= __put_user(0x0a, &codemem[1]);
-                err |= __put_user(retcall, &codemem[2]);
-                /* Generate instruction:  SYSCALL */
-                err |= __put_user(0x00, &codemem[3]);
-                err |= __put_user(0x05, &codemem[4]);
-                err |= __put_user(0x00, &codemem[5]);
+        /* Generate instruction:  MOVI a2, __NR_rt_sigreturn */
+        err |= __put_user(0x22, &codemem[0]);
+        err |= __put_user(0x0a, &codemem[1]);
+        err |= __put_user(__NR_rt_sigreturn, &codemem[2]);
+        /* Generate instruction:  SYSCALL */
+        err |= __put_user(0x00, &codemem[3]);
+        err |= __put_user(0x05, &codemem[4]);
+        err |= __put_user(0x00, &codemem[5]);
 
 #elif defined __XTENSA_EL__   /* Little Endian version */
-                /* Generate instruction:  MOVI a2, retcall */
-                err |= __put_user(0x22, &codemem[0]);
-                err |= __put_user(0xa0, &codemem[1]);
-                err |= __put_user(retcall, &codemem[2]);
-                /* Generate instruction:  SYSCALL */
-                err |= __put_user(0x00, &codemem[3]);
-                err |= __put_user(0x50, &codemem[4]);
-                err |= __put_user(0x00, &codemem[5]);
+        /* Generate instruction:  MOVI a2, __NR_rt_sigreturn */
+        err |= __put_user(0x22, &codemem[0]);
+        err |= __put_user(0xa0, &codemem[1]);
+        err |= __put_user(__NR_rt_sigreturn, &codemem[2]);
+        /* Generate instruction:  SYSCALL */
+        err |= __put_user(0x00, &codemem[3]);
+        err |= __put_user(0x50, &codemem[4]);
+        err |= __put_user(0x00, &codemem[5]);
 #else
-#error Must use compiler for Xtensa processors.
+# error Must use compiler for Xtensa processors.
 #endif
-        }
 
         /* Flush generated code out of the data cache */
 
@@ -504,97 +317,29 @@ gen_return_code(unsigned char *codemem, unsigned int use_rt_sigreturn)
         return err;
 }
 
-static void
-set_thread_state(struct pt_regs *regs, void *stack, unsigned char *retaddr,
-        void *handler, unsigned long arg1, void *arg2, void *arg3)
-{
-        /* Set up registers for signal handler */
-        start_thread(regs, (unsigned long) handler, (unsigned long) stack);
-
-        /* Set up a stack frame for a call4
-         * Note: PS.CALLINC is set to one by start_thread
-         */
-        regs->areg[4] = (((unsigned long) retaddr) & 0x3fffffff) | 0x40000000;
-        regs->areg[6] = arg1;
-        regs->areg[7] = (unsigned long) arg2;
-        regs->areg[8] = (unsigned long) arg3;
-}
 
-static void setup_frame(int sig, struct k_sigaction *ka,
+static void setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                         sigset_t *set, struct pt_regs *regs)
 {
-        struct sigframe *frame;
+        struct rt_sigframe *frame;
         int err = 0;
         int signal;
+        unsigned long sp, ra;
 
-        frame = get_sigframe(ka, regs->areg[1], sizeof(*frame));
-        if (regs->depc > 64)
-        {
-                printk("!!!!!!! DEPC !!!!!!!\n");
-                return;
-        }
-
-
-        if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
-                goto give_sigsegv;
-
-        signal = current_thread_info()->exec_domain
-                && current_thread_info()->exec_domain->signal_invmap
-                && sig < 32
-                ? current_thread_info()->exec_domain->signal_invmap[sig]
-                : sig;
-
-        err |= setup_sigcontext(&frame->sc, &frame->cpstate, regs, set->sig[0]);
+        sp = regs->areg[1];
 
-        if (_NSIG_WORDS > 1) {
-                err |= __copy_to_user(frame->extramask, &set->sig[1],
-                                      sizeof(frame->extramask));
+        if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! on_sig_stack(sp)) {
+                sp = current->sas_ss_sp + current->sas_ss_size;
         }
 
-        /* Create sys_sigreturn syscall in stack frame */
-        err |= gen_return_code(frame->retcode, USE_SIGRETURN);
-
-        if (err)
-                goto give_sigsegv;
-
-        /* Create signal handler execution context.
-         * Return context not modified until this point.
-         */
-        set_thread_state(regs, frame, frame->retcode,
-                ka->sa.sa_handler, signal, &frame->sc, NULL);
-
-        /* Set access mode to USER_DS.  Nomenclature is outdated, but
-         * functionality is used in uaccess.h
-         */
-        set_fs(USER_DS);
-
-
-#if DEBUG_SIG
-        printk("SIG deliver (%s:%d): signal=%d sp=%p pc=%08x\n",
-                current->comm, current->pid, signal, frame, regs->pc);
-#endif
-
-        return;
-
-give_sigsegv:
-        if (sig == SIGSEGV)
-                ka->sa.sa_handler = SIG_DFL;
-        force_sig(SIGSEGV, current);
-}
-
-static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
-                           sigset_t *set, struct pt_regs *regs)
-{
-        struct rt_sigframe *frame;
-        int err = 0;
-        int signal;
+        frame = (void *)((sp - sizeof(*frame)) & -16ul);
 
-        frame = get_sigframe(ka, regs->areg[1], sizeof(*frame));
         if (regs->depc > 64)
                 panic ("Double exception sys_sigreturn\n");
 
-        if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+        if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) {
                 goto give_sigsegv;
+        }
 
         signal = current_thread_info()->exec_domain
                 && current_thread_info()->exec_domain->signal_invmap
@@ -602,9 +347,12 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                 ? current_thread_info()->exec_domain->signal_invmap[sig]
                 : sig;
 
-        err |= copy_siginfo_to_user(&frame->info, info);
+        if (ka->sa.sa_flags & SA_SIGINFO) {
+                err |= copy_siginfo_to_user(&frame->info, info);
+        }
+
+        /* Create the user context.  */
 
-        /* Create the ucontext.  */
         err |= __put_user(0, &frame->uc.uc_flags);
         err |= __put_user(0, &frame->uc.uc_link);
         err |= __put_user((void *)current->sas_ss_sp,
@@ -617,16 +365,31 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
 
         /* Create sys_rt_sigreturn syscall in stack frame */
-        err |= gen_return_code(frame->retcode, USE_RT_SIGRETURN);
 
-        if (err)
+        err |= gen_return_code(frame->retcode);
+
+        if (err) {
                 goto give_sigsegv;
+        }
+                
 
-        /* Create signal handler execution context.
+        /* 
+         * Create signal handler execution context.
          * Return context not modified until this point.
          */
-        set_thread_state(regs, frame, frame->retcode,
-                ka->sa.sa_handler, signal, &frame->info, &frame->uc);
+
+        /* Set up registers for signal handler */
+        start_thread(regs, (unsigned long) ka->sa.sa_handler, 
+                     (unsigned long) frame);
+
+        /* Set up a stack frame for a call4
+         * Note: PS.CALLINC is set to one by start_thread
+         */
+        ra = (unsigned long) frame->retcode;
+        regs->areg[4] = (((unsigned long) ra) & 0x3fffffff) | 0x40000000;
+        regs->areg[6] = (unsigned long) signal;
+        regs->areg[7] = (unsigned long) &frame->info;
+        regs->areg[8] = (unsigned long) &frame->uc;
 
         /* Set access mode to USER_DS.  Nomenclature is outdated, but
          * functionality is used in uaccess.h
@@ -646,6 +409,48 @@ give_sigsegv:
         force_sig(SIGSEGV, current);
 }
 
+/*
+ * Atomically swap in the new signal mask, and wait for a signal.
+ */
+
+asmlinkage long xtensa_rt_sigsuspend(sigset_t __user *unewset, 
+                                     size_t sigsetsize,
+                                     long a2, long a3, long a4, long a5, 
+                                     struct pt_regs *regs)
+{
+        sigset_t saveset, newset;
+
+        /* XXX: Don't preclude handling different sized sigset_t's.  */
+        if (sigsetsize != sizeof(sigset_t))
+                return -EINVAL;
+
+        if (copy_from_user(&newset, unewset, sizeof(newset)))
+                return -EFAULT;
+
+        sigdelsetmask(&newset, ~_BLOCKABLE);
+        spin_lock_irq(&current->sighand->siglock);
+        saveset = current->blocked;
+        current->blocked = newset;
+        recalc_sigpending();
+        spin_unlock_irq(&current->sighand->siglock);
+
+        regs->areg[2] = -EINTR;
+        while (1) {
+                current->state = TASK_INTERRUPTIBLE;
+                schedule();
+                if (do_signal(regs, &saveset))
+                        return -EINTR;
+        }
+}
+
+asmlinkage long xtensa_sigaltstack(const stack_t __user *uss, 
+                                   stack_t __user *uoss,
+                                   long a2, long a3, long a4, long a5,
+                                   struct pt_regs *regs)
+{
+        return do_sigaltstack(uss, uoss, regs->areg[1]);
+}
+
 
 
 /*
@@ -663,51 +468,89 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
         int signr;
         struct k_sigaction ka;
 
+        if (!user_mode(regs))
+                return 0;
+
+        if (try_to_freeze())
+                goto no_signal;
+
         if (!oldset)
                 oldset = &current->blocked;
 
+        task_pt_regs(current)->icountlevel = 0;
+
         signr = get_signal_to_deliver(&info, &ka, regs, NULL);
 
-        /* Are we from a system call? */
-        if (regs->syscall >= 0) {
-                /* If so, check system call restarting.. */
-                switch (regs->areg[2]) {
-                        case ERESTARTNOHAND:
-                        case ERESTART_RESTARTBLOCK:
-                                regs->areg[2] = -EINTR;
-                                break;
+        if (signr > 0) {
+
+                /* Are we from a system call? */
+
+                if ((signed)regs->syscall >= 0) {
 
-                        case ERESTARTSYS:
-                                if (!(ka.sa.sa_flags & SA_RESTART)) {
+                        /* If so, check system call restarting.. */
+
+                        switch (regs->areg[2]) {
+                                case -ERESTARTNOHAND:
+                                case -ERESTART_RESTARTBLOCK:
                                         regs->areg[2] = -EINTR;
                                         break;
-                                }
-                        /* fallthrough */
-                        case ERESTARTNOINTR:
-                                regs->areg[2] = regs->syscall;
-                                regs->pc -= 3;
+
+                                case -ERESTARTSYS:
+                                        if (!(ka.sa.sa_flags & SA_RESTART)) {
+                                                regs->areg[2] = -EINTR;
+                                                break;
+                                        }
+                                        /* fallthrough */
+                                case -ERESTARTNOINTR:
+                                        regs->areg[2] = regs->syscall;
+                                        regs->pc -= 3;
+                                        break;
+
+                                default:
+                                        /* nothing to do */
+                                        if (regs->areg[2] != 0)
+                                        break;
+                        }
                 }
-        }
 
-        if (signr == 0)
-                return 0;               /* no signals delivered */
+                /* Whee!  Actually deliver the signal.  */
+                /* Set up the stack frame */
+                setup_frame(signr, &ka, &info, oldset, regs);
 
-        /* Whee!  Actually deliver the signal.  */
+                if (ka.sa.sa_flags & SA_ONESHOT)
+                        ka.sa.sa_handler = SIG_DFL;
 
-        /* Set up the stack frame */
-        if (ka.sa.sa_flags & SA_SIGINFO)
-                setup_rt_frame(signr, &ka, &info, oldset, regs);
-        else
-                setup_frame(signr, &ka, oldset, regs);
+                spin_lock_irq(&current->sighand->siglock);
+                sigorsets(&current->blocked, &current->blocked, &ka.sa.sa_mask);
+                if (!(ka.sa.sa_flags & SA_NODEFER))
+                        sigaddset(&current->blocked, signr);
+                recalc_sigpending();
+                spin_unlock_irq(&current->sighand->siglock);
+                if (current->ptrace & PT_SINGLESTEP)
+                        task_pt_regs(current)->icountlevel = 1;
 
-        if (ka.sa.sa_flags & SA_ONESHOT)
-                ka.sa.sa_handler = SIG_DFL;
+                return 1;
+        }
 
-        spin_lock_irq(&current->sighand->siglock);
-        sigorsets(&current->blocked, &current->blocked, &ka.sa.sa_mask);
-        if (!(ka.sa.sa_flags & SA_NODEFER))
-                sigaddset(&current->blocked, signr);
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
-        return 1;
+no_signal:
+        /* Did we come from a system call? */
+        if ((signed) regs->syscall >= 0) {
+                /* Restart the system call - no handlers present */
+                switch (regs->areg[2]) {
+                case -ERESTARTNOHAND:
+                case -ERESTARTSYS:
+                case -ERESTARTNOINTR:
+                        regs->areg[2] = regs->syscall;
+                        regs->pc -= 3;
+                        break;
+                case -ERESTART_RESTARTBLOCK:
+                        regs->areg[2] = __NR_restart_syscall;
+                        regs->pc -= 3;
+                        break;
+                }
+        }
+        if (current->ptrace & PT_SINGLESTEP)
+                task_pt_regs(current)->icountlevel = 1;
+        return 0;
 }
+
diff --git a/arch/xtensa/kernel/vmlinux.lds.S b/arch/xtensa/kernel/vmlinux.lds.S
index 4b7b4ff79973..b0582c3c5f8d 100644
--- a/arch/xtensa/kernel/vmlinux.lds.S
+++ b/arch/xtensa/kernel/vmlinux.lds.S
@@ -84,9 +84,7 @@ SECTIONS
   {
     /* The .head.text section must be the first section! */
     *(.head.text)
-    *(.literal)
-    TEXT_TEXT
-    *(.srom.text)
+    *(.literal .text)
     VMLINUX_SYMBOL(__sched_text_start) = .;
     *(.sched.literal .sched.text)
     VMLINUX_SYMBOL(__sched_text_end) = .;
@@ -96,6 +94,7 @@ SECTIONS
 
   }
   _etext = .;
+  PROVIDE (etext = .);
 
   . = ALIGN(16);
 
@@ -103,32 +102,6 @@ SECTIONS
 
   /*  Relocation table */
 
-  . = ALIGN(16);
-  __boot_reloc_table_start = ABSOLUTE(.);
-
-  __relocate : {
-
-    RELOCATE_ENTRY(_WindowVectors_text,
-                   .WindowVectors.text);
-#if 0
-    RELOCATE_ENTRY(_KernelExceptionVector_literal,
-                   .KernelExceptionVector.literal);
-#endif
-    RELOCATE_ENTRY(_KernelExceptionVector_text,
-                   .KernelExceptionVector.text);
-#if 0
-    RELOCATE_ENTRY(_UserExceptionVector_literal,
-                   .UserExceptionVector.literal);
-#endif
-    RELOCATE_ENTRY(_UserExceptionVector_text,
-                   .UserExceptionVector.text);
-    RELOCATE_ENTRY(_DoubleExceptionVector_literal,
-                   .DoubleExceptionVector.literal);
-    RELOCATE_ENTRY(_DoubleExceptionVector_text,
-                   .DoubleExceptionVector.text);
-  }
-  __boot_reloc_table_end = ABSOLUTE(.) ;
-
   .fixup   : { *(.fixup) }
 
   . = ALIGN(16);
@@ -145,8 +118,7 @@ SECTIONS
   _fdata = .;
   .data :
   {
-    DATA_DATA
-    CONSTRUCTORS
+    *(.data) CONSTRUCTORS
     . = ALIGN(XCHAL_ICACHE_LINESIZE);
     *(.data.cacheline_aligned)
   }
@@ -174,6 +146,22 @@ SECTIONS
     __tagtable_begin = .;
     *(.taglist)
     __tagtable_end = .;
+
+    . = ALIGN(16);
+    __boot_reloc_table_start = ABSOLUTE(.);
+
+    RELOCATE_ENTRY(_WindowVectors_text,
+                   .WindowVectors.text);
+    RELOCATE_ENTRY(_KernelExceptionVector_text,
+                   .KernelExceptionVector.text);
+    RELOCATE_ENTRY(_UserExceptionVector_text,
+                   .UserExceptionVector.text);
+    RELOCATE_ENTRY(_DoubleExceptionVector_literal,
+                   .DoubleExceptionVector.literal);
+    RELOCATE_ENTRY(_DoubleExceptionVector_text,
+                   .DoubleExceptionVector.text);
+  
+    __boot_reloc_table_end = ABSOLUTE(.) ;
   }
 
   . = ALIGN(XCHAL_ICACHE_LINESIZE);
@@ -194,16 +182,6 @@ SECTIONS
 
   SECURITY_INIT
 
-  . = ALIGN(4);
-
-  __start___ftr_fixup = .;
-  __ftr_fixup : { *(__ftr_fixup) }
-  __stop___ftr_fixup = .;
-
-  . = ALIGN(4096);
-  __per_cpu_start = .;
-  .data.percpu  : { *(.data.percpu) }
-  __per_cpu_end = .;
 
 #ifdef CONFIG_BLK_DEV_INITRD
   . = ALIGN(4096);
@@ -212,6 +190,12 @@ SECTIONS
   __initramfs_end = .;
 #endif
 
+  . = ALIGN(4096);
+  __per_cpu_start = .;
+  .data.percpu  : { *(.data.percpu) }
+  __per_cpu_end = .;
+
+
   /* We need this dummy segment here */
 
   . = ALIGN(4);
@@ -273,9 +257,9 @@ SECTIONS
 
   /* BSS section */
   _bss_start = .;
-  .sbss : { *(.sbss) *(.scommon) }
-  .bss : { *(COMMON) *(.bss) }
+  .bss : { *(.bss.page_aligned) *(.bss) }
   _bss_end = .;
+
   _end = .;
 
   /* only used by the boot loader  */
@@ -293,16 +277,16 @@ SECTIONS
     *(.ResetVector.text)
   }
 
-
   /* Sections to be discarded */
   /DISCARD/ :
   {
-        *(.text.exit)
-        *(.text.exit.literal)
-        *(.data.exit)
+        *(.exit.literal .exit.text)
+        *(.exit.data)
         *(.exitcall.exit)
   }
 
+  .xt.lit : { *(.xt.lit) }
+  .xt.prop : { *(.xt.prop) }
 
   .debug  0 :  { *(.debug) }
   .line  0 :  { *(.line) }
diff --git a/arch/xtensa/kernel/xtensa_ksyms.c b/arch/xtensa/kernel/xtensa_ksyms.c
index cd7e6a020602..60dbdb43fb4c 100644
--- a/arch/xtensa/kernel/xtensa_ksyms.c
+++ b/arch/xtensa/kernel/xtensa_ksyms.c
@@ -38,21 +38,10 @@
 /*
  * String functions
  */
-EXPORT_SYMBOL(memcmp);
 EXPORT_SYMBOL(memset);
 EXPORT_SYMBOL(memcpy);
 EXPORT_SYMBOL(memmove);
-EXPORT_SYMBOL(memchr);
-EXPORT_SYMBOL(strcat);
-EXPORT_SYMBOL(strchr);
-EXPORT_SYMBOL(strlen);
-EXPORT_SYMBOL(strncat);
-EXPORT_SYMBOL(strnlen);
-EXPORT_SYMBOL(strrchr);
-EXPORT_SYMBOL(strstr);
 
-EXPORT_SYMBOL(enable_irq);
-EXPORT_SYMBOL(disable_irq);
 EXPORT_SYMBOL(kernel_thread);
 
 /*
diff --git a/arch/xtensa/lib/strncpy_user.S b/arch/xtensa/lib/strncpy_user.S
index a834057bda6b..b2655d94558d 100644
--- a/arch/xtensa/lib/strncpy_user.S
+++ b/arch/xtensa/lib/strncpy_user.S
@@ -25,18 +25,18 @@
 /*
  * char *__strncpy_user(char *dst, const char *src, size_t len)
  */
-.text
-.begin literal
-.align  4
-.Lmask0:
-        .byte   0xff, 0x00, 0x00, 0x00
-.Lmask1:
-        .byte   0x00, 0xff, 0x00, 0x00
-.Lmask2:
-        .byte   0x00, 0x00, 0xff, 0x00
-.Lmask3:
-        .byte   0x00, 0x00, 0x00, 0xff
-.end literal
+
+#ifdef __XTENSA_EB__
+# define MASK0 0xff000000
+# define MASK1 0x00ff0000
+# define MASK2 0x0000ff00
+# define MASK3 0x000000ff
+#else
+# define MASK0 0x000000ff
+# define MASK1 0x0000ff00
+# define MASK2 0x00ff0000
+# define MASK3 0xff000000
+#endif
 
 # Register use
 #   a0/ return address
@@ -53,6 +53,7 @@
 #   a11/ dst
 #   a12/ tmp
 
+.text
 .align  4
 .global __strncpy_user
 .type   __strncpy_user,@function
@@ -61,10 +62,10 @@ __strncpy_user:
         # a2/ dst, a3/ src, a4/ len
         mov     a11, a2         # leave dst in return value register
         beqz    a4, .Lret       # if len is zero
-        l32r    a5, .Lmask0     # mask for byte 0
-        l32r    a6, .Lmask1     # mask for byte 1
-        l32r    a7, .Lmask2     # mask for byte 2
-        l32r    a8, .Lmask3     # mask for byte 3
+        movi    a5, MASK0       # mask for byte 0
+        movi    a6, MASK1       # mask for byte 1
+        movi    a7, MASK2       # mask for byte 2
+        movi    a8, MASK3       # mask for byte 3
         bbsi.l  a3, 0, .Lsrc1mod2 # if only  8-bit aligned
         bbsi.l  a3, 1, .Lsrc2mod4 # if only 16-bit aligned
 .Lsrcaligned:   # return here when src is word-aligned
diff --git a/arch/xtensa/lib/strnlen_user.S b/arch/xtensa/lib/strnlen_user.S
index 5e9c1e709b2e..ad3f616322ca 100644
--- a/arch/xtensa/lib/strnlen_user.S
+++ b/arch/xtensa/lib/strnlen_user.S
@@ -24,18 +24,18 @@
 /*
  * size_t __strnlen_user(const char *s, size_t len)
  */
-.text
-.begin literal
-.align  4
-.Lmask0:
-        .byte   0xff, 0x00, 0x00, 0x00
-.Lmask1:
-        .byte   0x00, 0xff, 0x00, 0x00
-.Lmask2:
-        .byte   0x00, 0x00, 0xff, 0x00
-.Lmask3:
-        .byte   0x00, 0x00, 0x00, 0xff
-.end literal
+
+#ifdef __XTENSA_EB__
+# define MASK0 0xff000000
+# define MASK1 0x00ff0000
+# define MASK2 0x0000ff00
+# define MASK3 0x000000ff
+#else
+# define MASK0 0x000000ff
+# define MASK1 0x0000ff00
+# define MASK2 0x00ff0000
+# define MASK3 0xff000000
+#endif
 
 # Register use:
 #   a2/ src
@@ -48,6 +48,7 @@
 #   a9/ tmp
 #   a10/ tmp
 
+.text
 .align  4
 .global __strnlen_user
 .type   __strnlen_user,@function
@@ -56,10 +57,10 @@ __strnlen_user:
         # a2/ s, a3/ len
         addi    a4, a2, -4      # because we overincrement at the end;
                                 # we compensate with load offsets of 4
-        l32r    a5, .Lmask0     # mask for byte 0
-        l32r    a6, .Lmask1     # mask for byte 1
-        l32r    a7, .Lmask2     # mask for byte 2
-        l32r    a8, .Lmask3     # mask for byte 3
+        movi    a5, MASK0       # mask for byte 0
+        movi    a6, MASK1       # mask for byte 1
+        movi    a7, MASK2       # mask for byte 2
+        movi    a8, MASK3       # mask for byte 3
         bbsi.l  a2, 0, .L1mod2  # if only  8-bit aligned
         bbsi.l  a2, 1, .L2mod4  # if only 16-bit aligned
 
diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c
index e1ec2d1e8189..8415c76f11c2 100644
--- a/arch/xtensa/mm/init.c
+++ b/arch/xtensa/mm/init.c
@@ -205,7 +205,7 @@ void __init init_mmu (void)
         /* Writing zeros to the <t>TLBCFG special registers ensure
          * that valid values exist in the register.  For existing
          * PGSZID<w> fields, zero selects the first element of the
-         * page-size array.  For nonexistant PGSZID<w> fields, zero is
+         * page-size array.  For nonexistent PGSZID<w> fields, zero is
          * the best value to write.  Also, when changing PGSZID<w>
          * fields, the corresponding TLB must be flushed.
          */
diff --git a/arch/xtensa/platform-iss/network.c b/arch/xtensa/platform-iss/network.c
index 4bfe333be229..f09962fa98c0 100644
--- a/arch/xtensa/platform-iss/network.c
+++ b/arch/xtensa/platform-iss/network.c
@@ -473,7 +473,7 @@ static int iss_net_open(struct net_device *dev)
         netif_start_queue(dev);
 
         /* clear buffer - it can happen that the host side of the interface
-         * is full when we gethere. In this case, new data is never queued,
+         * is full when we get here. In this case, new data is never queued,
          * SIGIOs never arrive, and the net never works.
          */
         while ((err = iss_net_rx(dev)) > 0)
diff --git a/include/asm-xtensa/bitops.h b/include/asm-xtensa/bitops.h
index d815649617aa..1c1e0d933eea 100644
--- a/include/asm-xtensa/bitops.h
+++ b/include/asm-xtensa/bitops.h
@@ -7,7 +7,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2001 - 2005 Tensilica Inc.
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
  */
 
 #ifndef _XTENSA_BITOPS_H
@@ -31,53 +31,30 @@
 
 #if XCHAL_HAVE_NSA
 
-static __inline__ int __cntlz (unsigned long x)
+static inline unsigned long __cntlz (unsigned long x)
 {
         int lz;
         asm ("nsau %0, %1" : "=r" (lz) : "r" (x));
-        return 31 - lz;
+        return lz;
 }
 
-#else
-
-static __inline__ int __cntlz (unsigned long x)
-{
-        unsigned long sum, x1, x2, x4, x8, x16;
-        x1  = x & 0xAAAAAAAA;
-        x2  = x & 0xCCCCCCCC;
-        x4  = x & 0xF0F0F0F0;
-        x8  = x & 0xFF00FF00;
-        x16 = x & 0xFFFF0000;
-        sum = x2 ? 2 : 0;
-        sum += (x16 != 0) * 16;
-        sum += (x8 != 0) * 8;
-        sum += (x4 != 0) * 4;
-        sum += (x1 != 0);
-
-        return sum;
-}
-
-#endif
-
 /*
  * ffz: Find first zero in word. Undefined if no zero exists.
  * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
  */
 
-static __inline__ int ffz(unsigned long x)
+static inline int ffz(unsigned long x)
 {
-        if ((x = ~x) == 0)
-                return 32;
-        return __cntlz(x & -x);
+        return 31 - __cntlz(~x & -~x);
 }
 
 /*
  * __ffs: Find first bit set in word. Return 0 for bit 0
  */
 
-static __inline__ int __ffs(unsigned long x)
+static inline int __ffs(unsigned long x)
 {
-        return __cntlz(x & -x);
+        return 31 - __cntlz(x & -x);
 }
 
 /*
@@ -86,9 +63,9 @@ static __inline__ int __ffs(unsigned long x)
  * differs in spirit from the above ffz (man ffs).
  */
 
-static __inline__ int ffs(unsigned long x)
+static inline int ffs(unsigned long x)
 {
-        return __cntlz(x & -x) + 1;
+        return 32 - __cntlz(x & -x);
 }
 
 /*
@@ -96,20 +73,36 @@ static __inline__ int ffs(unsigned long x)
  * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
  */
 
-static __inline__ int fls (unsigned int x)
+static inline int fls (unsigned int x)
 {
-        return __cntlz(x);
+        return 32 - __cntlz(x);
 }
+
+#else
+
+/* Use the generic implementation if we don't have the nsa/nsau instructions. */
+
+# include <asm-generic/bitops/ffs.h>
+# include <asm-generic/bitops/__ffs.h>
+# include <asm-generic/bitops/ffz.h>
+# include <asm-generic/bitops/fls.h>
+
+#endif
+
 #include <asm-generic/bitops/fls64.h>
 #include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/ext2-non-atomic.h>
 
 #ifdef __XTENSA_EL__
-# define ext2_set_bit_atomic(lock,nr,addr) test_and_set_bit((nr),(addr))
-# define ext2_clear_bit_atomic(lock,nr,addr) test_and_clear_bit((nr),(addr))
+# define ext2_set_bit_atomic(lock,nr,addr)                              \
+        test_and_set_bit((nr), (unsigned long*)(addr))
+# define ext2_clear_bit_atomic(lock,nr,addr)                            \
+        test_and_clear_bit((nr), (unsigned long*)(addr))
 #elif defined(__XTENSA_EB__)
-# define ext2_set_bit_atomic(lock,nr,addr) test_and_set_bit((nr) ^ 0x18, (addr))
-# define ext2_clear_bit_atomic(lock,nr,addr) test_and_clear_bit((nr)^0x18,(addr))
+# define ext2_set_bit_atomic(lock,nr,addr)                              \
+        test_and_set_bit((nr) ^ 0x18, (unsigned long*)(addr))
+# define ext2_clear_bit_atomic(lock,nr,addr)                            \
+        test_and_clear_bit((nr) ^ 0x18, (unsigned long*)(addr))
 #else
 # error processor byte order undefined!
 #endif
diff --git a/include/asm-xtensa/byteorder.h b/include/asm-xtensa/byteorder.h
index 0f540a5f4c01..765edf17a9a4 100644
--- a/include/asm-xtensa/byteorder.h
+++ b/include/asm-xtensa/byteorder.h
@@ -12,6 +12,7 @@
 #define _XTENSA_BYTEORDER_H
 
 #include <asm/types.h>
+#include <linux/compiler.h>
 
 static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
 {
@@ -78,4 +79,4 @@ static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x)
 # error processor byte order undefined!
 #endif
 
-#endif /* __ASM_XTENSA_BYTEORDER_H */
+#endif /* _XTENSA_BYTEORDER_H */
diff --git a/include/asm-xtensa/coprocessor.h b/include/asm-xtensa/coprocessor.h
index bd09ec02d57f..aa2121034558 100644
--- a/include/asm-xtensa/coprocessor.h
+++ b/include/asm-xtensa/coprocessor.h
@@ -64,6 +64,7 @@ typedef struct {
 #  define COPROCESSOR_INFO_SIZE 8
 # endif
 #endif
+#endif  /* XCHAL_HAVE_CP */
 
 
 #ifndef __ASSEMBLY__
@@ -74,8 +75,11 @@ extern void save_coprocessor_registers(void*, int);
 # else
 #  define release_coprocessors(task)
 # endif
-#endif
 
-#endif
+typedef unsigned char cp_state_t[XTENSA_CP_EXTRA_SIZE]
+        __attribute__ ((aligned (XTENSA_CP_EXTRA_ALIGN)));
+
+#endif  /* !__ASSEMBLY__ */
+
 
 #endif  /* _XTENSA_COPROCESSOR_H */
diff --git a/include/asm-xtensa/div64.h b/include/asm-xtensa/div64.h
index 20965e3af1dd..f35678cb0a9b 100644
--- a/include/asm-xtensa/div64.h
+++ b/include/asm-xtensa/div64.h
@@ -5,21 +5,12 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2001 - 2005 Tensilica Inc.
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
  */
 
 #ifndef _XTENSA_DIV64_H
 #define _XTENSA_DIV64_H
 
-#include <linux/types.h>
+#include <asm-generic/div64.h>
 
-#define do_div(n,base) ({ \
-        int __res = n % ((unsigned int) base); \
-        n /= (unsigned int) base; \
-        __res; })
-
-static inline uint64_t div64_64(uint64_t dividend, uint64_t divisor)
-{
-        return dividend / divisor;
-}
-#endif
+#endif /* _XTENSA_DIV64_H */
diff --git a/include/asm-xtensa/elf.h b/include/asm-xtensa/elf.h
index f0f9fd8560a5..1569b53cec91 100644
--- a/include/asm-xtensa/elf.h
+++ b/include/asm-xtensa/elf.h
@@ -13,7 +13,6 @@
 #ifndef _XTENSA_ELF_H
 #define _XTENSA_ELF_H
 
-#include <asm/variant/core.h>
 #include <asm/ptrace.h>
 
 /* Xtensa processor ELF architecture-magic number */
@@ -49,7 +48,7 @@ typedef struct {
         elf_greg_t lcount;
         elf_greg_t sar;
         elf_greg_t syscall;
-        elf_greg_t ar[XCHAL_NUM_AREGS];
+        elf_greg_t ar[64];
 } xtensa_gregset_t;
 
 #define ELF_NGREG       (sizeof(xtensa_gregset_t) / sizeof(elf_greg_t))
diff --git a/include/asm-xtensa/fcntl.h b/include/asm-xtensa/fcntl.h
index 0609fc691b72..46ab12db5739 100644
--- a/include/asm-xtensa/fcntl.h
+++ b/include/asm-xtensa/fcntl.h
@@ -1,99 +1 @@
-/*
- * include/asm-xtensa/fcntl.h
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1995, 1996, 1997, 1998 by Ralf Baechle
- * Copyright (C) 2001 - 2005 Tensilica Inc.
- */
-
-#ifndef _XTENSA_FCNTL_H
-#define _XTENSA_FCNTL_H
-
-/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
-   located on an ext2 file system */
-#define O_ACCMODE          0003
-#define O_RDONLY             00
-#define O_WRONLY             01
-#define O_RDWR               02
-#define O_CREAT            0100 /* not fcntl */
-#define O_EXCL             0200 /* not fcntl */
-#define O_NOCTTY           0400 /* not fcntl */
-#define O_TRUNC           01000 /* not fcntl */
-#define O_APPEND          02000
-#define O_NONBLOCK        04000
-#define O_NDELAY        O_NONBLOCK
-#define O_SYNC           010000
-#define FASYNC           020000 /* fcntl, for BSD compatibility */
-#define O_DIRECT         040000 /* direct disk access hint */
-#define O_LARGEFILE     0100000
-#define O_DIRECTORY     0200000 /* must be a directory */
-#define O_NOFOLLOW      0400000 /* don't follow links */
-#define O_NOATIME       01000000
-
-#define F_DUPFD         0       /* dup */
-#define F_GETFD         1       /* get close_on_exec */
-#define F_SETFD         2       /* set/clear close_on_exec */
-#define F_GETFL         3       /* get file->f_flags */
-#define F_SETFL         4       /* set file->f_flags */
-#define F_GETLK         5
-#define F_SETLK         6
-#define F_SETLKW        7
-
-#define F_SETOWN        8       /*  for sockets. */
-#define F_GETOWN        9       /*  for sockets. */
-#define F_SETSIG        10      /*  for sockets. */
-#define F_GETSIG        11      /*  for sockets. */
-
-#define F_GETLK64       12      /*  using 'struct flock64' */
-#define F_SETLK64       13
-#define F_SETLKW64      14
-
-/* for F_[GET|SET]FL */
-#define FD_CLOEXEC      1       /* actually anything with low bit set goes */
-
-/* for posix fcntl() and lockf() */
-#define F_RDLCK         0
-#define F_WRLCK         1
-#define F_UNLCK         2
-
-/* for old implementation of bsd flock () */
-#define F_EXLCK         4       /* or 3 */
-#define F_SHLCK         8       /* or 4 */
-
-/* for leases */
-#define F_INPROGRESS    16
-
-/* operations for bsd flock(), also used by the kernel implementation */
-#define LOCK_SH         1       /* shared lock */
-#define LOCK_EX         2       /* exclusive lock */
-#define LOCK_NB         4       /* or'd with one of the above to prevent
-                                   blocking */
-#define LOCK_UN         8       /* remove lock */
-
-#define LOCK_MAND       32      /* This is a mandatory flock */
-#define LOCK_READ       64      /* ... Which allows concurrent read operations */
-#define LOCK_WRITE      128     /* ... Which allows concurrent write operations */
-#define LOCK_RW         192     /* ... Which allows concurrent read & write ops */
-
-struct flock {
-        short l_type;
-        short l_whence;
-        off_t l_start;
-        off_t l_len;
-        pid_t l_pid;
-};
-
-struct flock64 {
-        short  l_type;
-        short  l_whence;
-        loff_t l_start;
-        loff_t l_len;
-        pid_t  l_pid;
-};
-
-#define F_LINUX_SPECIFIC_BASE   1024
-
-#endif /* _XTENSA_FCNTL_H */
+#include <asm-generic/fcntl.h>
diff --git a/include/asm-xtensa/mmu_context.h b/include/asm-xtensa/mmu_context.h
index 92f948392ebc..c0fd8e5b4513 100644
--- a/include/asm-xtensa/mmu_context.h
+++ b/include/asm-xtensa/mmu_context.h
@@ -14,6 +14,7 @@
 #define _XTENSA_MMU_CONTEXT_H
 
 #include <linux/stringify.h>
+#include <linux/sched.h>
 
 #include <asm/pgtable.h>
 #include <asm/cacheflush.h>
diff --git a/include/asm-xtensa/page.h b/include/asm-xtensa/page.h
index c631d006194b..1213cde75438 100644
--- a/include/asm-xtensa/page.h
+++ b/include/asm-xtensa/page.h
@@ -131,6 +131,6 @@ void copy_user_page(void *to,void* from,unsigned long vaddr,struct page* page);
 #define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
                                  VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 
-#endif /* __KERNEL__ */
 #include <asm-generic/memory_model.h>
+#endif /* __KERNEL__ */
 #endif /* _XTENSA_PAGE_H */
diff --git a/include/asm-xtensa/param.h b/include/asm-xtensa/param.h
index 6f281392e3f8..ce3a336cad07 100644
--- a/include/asm-xtensa/param.h
+++ b/include/asm-xtensa/param.h
@@ -11,15 +11,13 @@
 #ifndef _XTENSA_PARAM_H
 #define _XTENSA_PARAM_H
 
-#include <asm/variant/core.h>
-
 #ifdef __KERNEL__
 # define HZ             100             /* internal timer frequency */
 # define USER_HZ        100             /* for user interfaces in "ticks" */
 # define CLOCKS_PER_SEC (USER_HZ)       /* frequnzy at which times() counts */
 #endif
 
-#define EXEC_PAGESIZE   (1 << XCHAL_MMU_MIN_PTE_PAGE_SIZE)
+#define EXEC_PAGESIZE   4096
 
 #ifndef NGROUPS
 #define NGROUPS         32
diff --git a/include/asm-xtensa/ptrace.h b/include/asm-xtensa/ptrace.h
index 1b7fe363fad1..77ff02d307bb 100644
--- a/include/asm-xtensa/ptrace.h
+++ b/include/asm-xtensa/ptrace.h
@@ -11,8 +11,6 @@
 #ifndef _XTENSA_PTRACE_H
 #define _XTENSA_PTRACE_H
 
-#include <asm/variant/core.h>
-
 /*
  * Kernel stack
  *
@@ -101,7 +99,8 @@ struct pt_regs {
         unsigned long windowbase;       /*  48 */
         unsigned long windowstart;      /*  52 */
         unsigned long syscall;          /*  56 */
-        int reserved[2];                /*  64 */
+        unsigned long icountlevel;      /*  60 */
+        int reserved[1];                /*  64 */
 
         /* Make sure the areg field is 16 bytes aligned. */
         int align[0] __attribute__ ((aligned(16)));
@@ -113,6 +112,9 @@ struct pt_regs {
 };
 
 #ifdef __KERNEL__
+
+#include <asm/variant/core.h>
+
 # define task_pt_regs(tsk) ((struct pt_regs*) \
   (task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1)
 # define user_mode(regs) (((regs)->ps & 0x00000020)!=0)
diff --git a/include/asm-xtensa/shmparam.h b/include/asm-xtensa/shmparam.h
index d3b65bfa71c3..c8cc16c3da9e 100644
--- a/include/asm-xtensa/shmparam.h
+++ b/include/asm-xtensa/shmparam.h
@@ -9,8 +9,6 @@
 #ifndef _XTENSA_SHMPARAM_H
 #define _XTENSA_SHMPARAM_H
 
-#include <asm/processor.h>
-
 /*
  * Xtensa can have variable size caches, and if
  * the size of single way is larger than the page size,
diff --git a/include/asm-xtensa/sigcontext.h b/include/asm-xtensa/sigcontext.h
index a75177291418..e3381cee5059 100644
--- a/include/asm-xtensa/sigcontext.h
+++ b/include/asm-xtensa/sigcontext.h
@@ -5,21 +5,12 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2001 - 2003 Tensilica Inc.
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
  */
 
 #ifndef _XTENSA_SIGCONTEXT_H
 #define _XTENSA_SIGCONTEXT_H
 
-#define _ASMLANGUAGE
-#include <asm/processor.h>
-#include <asm/coprocessor.h>
-
-
-struct _cpstate {
-        unsigned char _cpstate[XTENSA_CP_EXTRA_SIZE];
-} __attribute__ ((aligned (XTENSA_CP_EXTRA_ALIGN)));
-
 
 struct sigcontext {
         unsigned long   oldmask;
@@ -27,18 +18,13 @@ struct sigcontext {
         /* CPU registers */
         unsigned long sc_pc;
         unsigned long sc_ps;
-        unsigned long sc_wmask;
-        unsigned long sc_windowbase;
-        unsigned long sc_windowstart;
         unsigned long sc_lbeg;
         unsigned long sc_lend;
         unsigned long sc_lcount;
         unsigned long sc_sar;
-        unsigned long sc_depc;
-        unsigned long sc_dareg0;
-        unsigned long sc_treg[4];
-        unsigned long sc_areg[XCHAL_NUM_AREGS];
-        struct _cpstate *sc_cpstate;
+        unsigned long sc_acclo;
+        unsigned long sc_acchi;
+        unsigned long sc_a[16];
 };
 
-#endif /* __ASM_XTENSA_SIGCONTEXT_H */
+#endif /* _XTENSA_SIGCONTEXT_H */
diff --git a/include/asm-xtensa/thread_info.h b/include/asm-xtensa/thread_info.h
index 5ae34ab71597..3fa29799b435 100644
--- a/include/asm-xtensa/thread_info.h
+++ b/include/asm-xtensa/thread_info.h
@@ -116,6 +116,7 @@ static inline struct thread_info *current_thread_info(void)
 #define TIF_SINGLESTEP          4       /* restore singlestep on return to user mode */
 #define TIF_IRET                5       /* return with iret */
 #define TIF_MEMDIE              6
+#define TIF_RESTORE_SIGMASK     7       /* restore signal mask in do_signal() */
 #define TIF_POLLING_NRFLAG      16      /* true if poll_idle() is polling TIF_NEED_RESCHED */
 
 #define _TIF_SYSCALL_TRACE      (1<<TIF_SYSCALL_TRACE)
@@ -125,6 +126,7 @@ static inline struct thread_info *current_thread_info(void)
 #define _TIF_SINGLESTEP         (1<<TIF_SINGLESTEP)
 #define _TIF_IRET               (1<<TIF_IRET)
 #define _TIF_POLLING_NRFLAG     (1<<TIF_POLLING_NRFLAG)
+#define _TIF_RESTORE_SIGMASK    (1<<TIF_RESTORE_SIGMASK)
 
 #define _TIF_WORK_MASK          0x0000FFFE      /* work to do on interrupt/exception return */
 #define _TIF_ALLWORK_MASK       0x0000FFFF      /* work to do on any return to u-space */
diff --git a/include/asm-xtensa/unistd.h b/include/asm-xtensa/unistd.h
index 8a7fb6964ce1..9bd34024431c 100644
--- a/include/asm-xtensa/unistd.h
+++ b/include/asm-xtensa/unistd.h
@@ -485,8 +485,8 @@ __SYSCALL(217, sys_sched_get_priority_min, 1)
 __SYSCALL(218, sys_sched_rr_get_interval, 2)
 #define __NR_sched_yield                        219
 __SYSCALL(219, sys_sched_yield, 0)
-#define __NR_sigreturn                          222
-__SYSCALL(222, xtensa_sigreturn, 0)
+#define __NR_available222                       222
+__SYSCALL(222, sys_ni_syscall, 0)
 
 /* Signal Handling */