Merge with /home/shaggy/git/linus-clean/

4 files changed, 44 insertions, 52 deletions

diff --git a/arch/m32r/kernel/m32r_ksyms.c b/arch/m32r/kernel/m32r_ksyms.c
index dbc8a392105f..be8b711367ec 100644
--- a/arch/m32r/kernel/m32r_ksyms.c
+++ b/arch/m32r/kernel/m32r_ksyms.c
@@ -18,11 +18,6 @@
 #include <asm/irq.h>
 #include <asm/tlbflush.h>
 
-#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD) || defined(CONFIG_BLK_DEV_IDE_MODULE) || defined(CONFIG_BLK_DEV_HD_MODULE)
-extern struct drive_info_struct drive_info;
-EXPORT_SYMBOL(drive_info);
-#endif
-
 /* platform dependent support */
 EXPORT_SYMBOL(boot_cpu_data);
 EXPORT_SYMBOL(dump_fpu);
diff --git a/arch/m32r/kernel/setup.c b/arch/m32r/kernel/setup.c
index c2e4dccf0112..d742037a7ccb 100644
--- a/arch/m32r/kernel/setup.c
+++ b/arch/m32r/kernel/setup.c
@@ -37,12 +37,6 @@
 extern void init_mmu(void);
 #endif
 
-#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD)   \
-        || defined(CONFIG_BLK_DEV_IDE_MODULE)                   \
-        || defined(CONFIG_BLK_DEV_HD_MODULE)
-struct drive_info_struct { char dummy[32]; } drive_info;
-#endif
-
 extern char _end[];
 
 /*
diff --git a/arch/m32r/kernel/signal.c b/arch/m32r/kernel/signal.c
index 71763f7a1d19..cb33097fefc4 100644
--- a/arch/m32r/kernel/signal.c
+++ b/arch/m32r/kernel/signal.c
@@ -36,7 +36,7 @@ int do_signal(struct pt_regs *, sigset_t *);
 asmlinkage int
 sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize,
                   unsigned long r2, unsigned long r3, unsigned long r4,
-                  unsigned long r5, unsigned long r6, struct pt_regs regs)
+                  unsigned long r5, unsigned long r6, struct pt_regs *regs)
 {
         sigset_t saveset, newset;
 
@@ -54,21 +54,21 @@ sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize,
         recalc_sigpending();
         spin_unlock_irq(&current->sighand->siglock);
 
-        regs.r0 = -EINTR;
+        regs->r0 = -EINTR;
         while (1) {
                 current->state = TASK_INTERRUPTIBLE;
                 schedule();
-                if (do_signal(&regs, &saveset))
-                        return regs.r0;
+                if (do_signal(regs, &saveset))
+                        return regs->r0;
         }
 }
 
 asmlinkage int
 sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
                 unsigned long r2, unsigned long r3, unsigned long r4,
-                unsigned long r5, unsigned long r6, struct pt_regs regs)
+                unsigned long r5, unsigned long r6, struct pt_regs *regs)
 {
-        return do_sigaltstack(uss, uoss, regs.spu);
+        return do_sigaltstack(uss, uoss, regs->spu);
 }
 
 
@@ -140,11 +140,10 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc,
 asmlinkage int
 sys_rt_sigreturn(unsigned long r0, unsigned long r1,
                  unsigned long r2, unsigned long r3, unsigned long r4,
-                 unsigned long r5, unsigned long r6, struct pt_regs regs)
+                 unsigned long r5, unsigned long r6, struct pt_regs *regs)
 {
-        struct rt_sigframe __user *frame = (struct rt_sigframe __user *)regs.spu;
+        struct rt_sigframe __user *frame = (struct rt_sigframe __user *)regs->spu;
         sigset_t set;
-        stack_t st;
         int result;
 
         if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
@@ -158,14 +157,11 @@ sys_rt_sigreturn(unsigned long r0, unsigned long r1,
         recalc_sigpending();
         spin_unlock_irq(&current->sighand->siglock);
 
-        if (restore_sigcontext(&regs, &frame->uc.uc_mcontext, &result))
+        if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &result))
                 goto badframe;
 
-        if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
+        if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->spu) == -EFAULT)
                 goto badframe;
-        /* It is more difficult to avoid calling this function than to
-           call it and ignore errors.  */
-        do_sigaltstack(&st, NULL, regs.spu);
 
         return result;
 
diff --git a/arch/m32r/kernel/sys_m32r.c b/arch/m32r/kernel/sys_m32r.c
index fe55b28d3725..670cb49210af 100644
--- a/arch/m32r/kernel/sys_m32r.c
+++ b/arch/m32r/kernel/sys_m32r.c
@@ -29,28 +29,7 @@
 
 /*
  * sys_tas() - test-and-set
- * linuxthreads testing version
  */
-#ifndef CONFIG_SMP
-asmlinkage int sys_tas(int *addr)
-{
-        int oldval;
-        unsigned long flags;
-
-        if (!access_ok(VERIFY_WRITE, addr, sizeof (int)))
-                return -EFAULT;
-        local_irq_save(flags);
-        oldval = *addr;
-        if (!oldval)
-                *addr = 1;
-        local_irq_restore(flags);
-        return oldval;
-}
-#else /* CONFIG_SMP */
-#include <linux/spinlock.h>
-
-static DEFINE_SPINLOCK(tas_lock);
-
 asmlinkage int sys_tas(int *addr)
 {
         int oldval;
@@ -58,15 +37,43 @@ asmlinkage int sys_tas(int *addr)
         if (!access_ok(VERIFY_WRITE, addr, sizeof (int)))
                 return -EFAULT;
 
-        _raw_spin_lock(&tas_lock);
-        oldval = *addr;
-        if (!oldval)
-                *addr = 1;
-        _raw_spin_unlock(&tas_lock);
+        /* atomic operation:
+         *   oldval = *addr; *addr = 1;
+         */
+        __asm__ __volatile__ (
+                DCACHE_CLEAR("%0", "r4", "%1")
+                "       .fillinsn\n"
+                "1:\n"
+                "       lock    %0, @%1     ->  unlock  %2, @%1\n"
+                "2:\n"
+                /* NOTE:
+                 *   The m32r processor can accept interrupts only
+                 *   at the 32-bit instruction boundary.
+                 *   So, in the above code, the "unlock" instruction
+                 *   can be executed continuously after the "lock"
+                 *   instruction execution without any interruptions.
+                 */
+                ".section .fixup,\"ax\"\n"
+                "       .balign 4\n"
+                "3:     ldi     %0, #%3\n"
+                "       seth    r14, #high(2b)\n"
+                "       or3     r14, r14, #low(2b)\n"
+                "       jmp     r14\n"
+                ".previous\n"
+                ".section __ex_table,\"a\"\n"
+                "       .balign 4\n"
+                "       .long 1b,3b\n"
+                ".previous\n"
+                : "=&r" (oldval)
+                : "r" (addr), "r" (1), "i"(-EFAULT)
+                : "r14", "memory"
+#ifdef CONFIG_CHIP_M32700_TS1
+                  , "r4"
+#endif /* CONFIG_CHIP_M32700_TS1 */
+        );
 
         return oldval;
 }
-#endif /* CONFIG_SMP */
 
 /*
  * sys_pipe() is the normal C calling standard for creating