12 files changed, 62 insertions, 104 deletions

diff --git a/arch/alpha/include/asm/Kbuild b/arch/alpha/include/asm/Kbuild
index 64ffc9e9e548..dcfabb9f05a0 100644
--- a/arch/alpha/include/asm/Kbuild
+++ b/arch/alpha/include/asm/Kbuild
@@ -11,3 +11,4 @@ header-y += reg.h
 header-y += regdef.h
 header-y += sysinfo.h
 generic-y += exec.h
+generic-y += trace_clock.h
diff --git a/arch/alpha/include/asm/ioctls.h b/arch/alpha/include/asm/ioctls.h
index 80e1cee90f1f..92c557be49fc 100644
--- a/arch/alpha/include/asm/ioctls.h
+++ b/arch/alpha/include/asm/ioctls.h
@@ -95,6 +95,9 @@
 #define TIOCGDEV        _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
 #define TIOCSIG         _IOW('T',0x36, int)  /* Generate signal on Pty slave */
 #define TIOCVHANGUP     0x5437
+#define TIOCGPKT        _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK      _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL       _IOR('T', 0x40, int) /* Get exclusive mode state */
 
 #define TIOCSERCONFIG   0x5453
 #define TIOCSERGWILD    0x5454
diff --git a/arch/alpha/include/asm/mman.h b/arch/alpha/include/asm/mman.h
index cbeb3616a28e..0086b472bc2b 100644
--- a/arch/alpha/include/asm/mman.h
+++ b/arch/alpha/include/asm/mman.h
@@ -63,4 +63,15 @@
 /* compatibility flags */
 #define MAP_FILE        0
 
+/*
+ * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.
+ * This gives us 6 bits, which is enough until someone invents 128 bit address
+ * spaces.
+ *
+ * Assume these are all power of twos.
+ * When 0 use the default page size.
+ */
+#define MAP_HUGE_SHIFT  26
+#define MAP_HUGE_MASK   0x3f
+
 #endif /* __ALPHA_MMAN_H__ */
diff --git a/arch/alpha/include/asm/ptrace.h b/arch/alpha/include/asm/ptrace.h
index b87755a19554..b4c5b2fbb647 100644
--- a/arch/alpha/include/asm/ptrace.h
+++ b/arch/alpha/include/asm/ptrace.h
@@ -78,6 +78,7 @@ struct switch_stack {
 
 #define current_pt_regs() \
   ((struct pt_regs *) ((char *)current_thread_info() + 2*PAGE_SIZE) - 1)
+#define signal_pt_regs current_pt_regs
 
 #define force_successful_syscall_return() (current_pt_regs()->r0 = 0)
 
diff --git a/arch/alpha/include/asm/signal.h b/arch/alpha/include/asm/signal.h
index a9388300abb1..45552862cc10 100644
--- a/arch/alpha/include/asm/signal.h
+++ b/arch/alpha/include/asm/signal.h
@@ -164,9 +164,6 @@ struct sigstack {
 
 #ifdef __KERNEL__
 #include <asm/sigcontext.h>
-
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
 #endif
 
 #endif
diff --git a/arch/alpha/include/asm/unistd.h b/arch/alpha/include/asm/unistd.h
index 7826e227e4d0..eb3a4664ced2 100644
--- a/arch/alpha/include/asm/unistd.h
+++ b/arch/alpha/include/asm/unistd.h
@@ -482,6 +482,9 @@
 #define __ARCH_WANT_SYS_SIGPENDING
 #define __ARCH_WANT_SYS_RT_SIGSUSPEND
 #define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
+#define __ARCH_WANT_SYS_CLONE
 
 /* "Conditional" syscalls.  What we want is
 
diff --git a/arch/alpha/kernel/binfmt_loader.c b/arch/alpha/kernel/binfmt_loader.c
index d1f474d1d44d..9525660c93c0 100644
--- a/arch/alpha/kernel/binfmt_loader.c
+++ b/arch/alpha/kernel/binfmt_loader.c
@@ -5,7 +5,7 @@
 #include <linux/binfmts.h>
 #include <linux/a.out.h>
 
-static int load_binary(struct linux_binprm *bprm, struct pt_regs *regs)
+static int load_binary(struct linux_binprm *bprm)
 {
         struct exec *eh = (struct exec *)bprm->buf;
         unsigned long loader;
@@ -37,7 +37,7 @@ static int load_binary(struct linux_binprm *bprm, struct pt_regs *regs)
         retval = prepare_binprm(bprm);
         if (retval < 0)
                 return retval;
-        return search_binary_handler(bprm,regs);
+        return search_binary_handler(bprm);
 }
 
 static struct linux_binfmt loader_format = {
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index a7607832dd4f..f62a994ef126 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -612,47 +612,24 @@ ret_from_kernel_thread:
  * Special system calls.  Most of these are special in that they either
  * have to play switch_stack games or in some way use the pt_regs struct.
  */
-        .align  4
-        .globl  sys_fork
-        .ent    sys_fork
-sys_fork:
-        .prologue 0
-        mov     $sp, $21
-        bsr     $1, do_switch_stack
-        bis     $31, SIGCHLD, $16
-        mov     $31, $17
-        mov     $31, $18
-        mov     $31, $19
-        mov     $31, $20
-        jsr     $26, alpha_clone
-        bsr     $1, undo_switch_stack
-        ret
-.end sys_fork
 
+.macro  fork_like name
         .align  4
-        .globl  sys_clone
-        .ent    sys_clone
-sys_clone:
+        .globl  alpha_\name
+        .ent    alpha_\name
+alpha_\name:
         .prologue 0
-        mov     $sp, $21
         bsr     $1, do_switch_stack
-        /* $16, $17, $18, $19, $20 come from the user.  */
-        jsr     $26, alpha_clone
-        bsr     $1, undo_switch_stack
+        jsr     $26, sys_\name
+        ldq     $26, 56($sp)
+        lda     $sp, SWITCH_STACK_SIZE($sp)
         ret
-.end sys_clone
+.end    alpha_\name
+.endm
 
-        .align  4
-        .globl  sys_vfork
-        .ent    sys_vfork
-sys_vfork:
-        .prologue 0
-        mov     $sp, $16
-        bsr     $1, do_switch_stack
-        jsr     $26, alpha_vfork
-        bsr     $1, undo_switch_stack
-        ret
-.end sys_vfork
+fork_like fork
+fork_like vfork
+fork_like clone
 
         .align  4
         .globl  sys_sigreturn
@@ -661,8 +638,6 @@ sys_sigreturn:
         .prologue 0
         lda     $9, ret_from_straced
         cmpult  $26, $9, $9
-        mov     $sp, $17
-        lda     $18, -SWITCH_STACK_SIZE($sp)
         lda     $sp, -SWITCH_STACK_SIZE($sp)
         jsr     $26, do_sigreturn
         bne     $9, 1f
@@ -678,8 +653,6 @@ sys_rt_sigreturn:
         .prologue 0
         lda     $9, ret_from_straced
         cmpult  $26, $9, $9
-        mov     $sp, $17
-        lda     $18, -SWITCH_STACK_SIZE($sp)
         lda     $sp, -SWITCH_STACK_SIZE($sp)
         jsr     $26, do_rt_sigreturn
         bne     $9, 1f
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 51987dcf79b8..b5d0d0923699 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -235,51 +235,28 @@ release_thread(struct task_struct *dead_task)
 }
 
 /*
- * "alpha_clone()".. By the time we get here, the
- * non-volatile registers have also been saved on the
- * stack. We do some ugly pointer stuff here.. (see
- * also copy_thread)
- *
- * Notice that "fork()" is implemented in terms of clone,
- * with parameters (SIGCHLD, 0).
- */
-int
-alpha_clone(unsigned long clone_flags, unsigned long usp,
-            int __user *parent_tid, int __user *child_tid,
-            unsigned long tls_value, struct pt_regs *regs)
-{
-        if (!usp)
-                usp = rdusp();
-
-        return do_fork(clone_flags, usp, regs, 0, parent_tid, child_tid);
-}
-
-int
-alpha_vfork(struct pt_regs *regs)
-{
-        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(),
-                       regs, 0, NULL, NULL);
-}
-
-/*
  * Copy an alpha thread..
  */
 
 int
 copy_thread(unsigned long clone_flags, unsigned long usp,
             unsigned long arg,
-            struct task_struct * p, struct pt_regs * regs)
+            struct task_struct *p)
 {
         extern void ret_from_fork(void);
         extern void ret_from_kernel_thread(void);
 
         struct thread_info *childti = task_thread_info(p);
         struct pt_regs *childregs = task_pt_regs(p);
+        struct pt_regs *regs = current_pt_regs();
         struct switch_stack *childstack, *stack;
         unsigned long settls;
 
         childstack = ((struct switch_stack *) childregs) - 1;
-        if (unlikely(!regs)) {
+        childti->pcb.ksp = (unsigned long) childstack;
+        childti->pcb.flags = 1; /* set FEN, clear everything else */
+
+        if (unlikely(p->flags & PF_KTHREAD)) {
                 /* kernel thread */
                 memset(childstack, 0,
                         sizeof(struct switch_stack) + sizeof(struct pt_regs));
@@ -288,12 +265,17 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
                 childstack->r10 = arg;
                 childregs->hae = alpha_mv.hae_cache,
                 childti->pcb.usp = 0;
-                childti->pcb.ksp = (unsigned long) childstack;
-                childti->pcb.flags = 1; /* set FEN, clear everything else */
                 return 0;
         }
+        /* Note: if CLONE_SETTLS is not set, then we must inherit the
+           value from the parent, which will have been set by the block
+           copy in dup_task_struct.  This is non-intuitive, but is
+           required for proper operation in the case of a threaded
+           application calling fork.  */
+        if (clone_flags & CLONE_SETTLS)
+                childti->pcb.unique = regs->r20;
+        childti->pcb.usp = usp ?: rdusp();
         *childregs = *regs;
-        settls = regs->r20;
         childregs->r0 = 0;
         childregs->r19 = 0;
         childregs->r20 = 1;     /* OSF/1 has some strange fork() semantics.  */
@@ -301,22 +283,6 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
         stack = ((struct switch_stack *) regs) - 1;
         *childstack = *stack;
         childstack->r26 = (unsigned long) ret_from_fork;
-        childti->pcb.usp = usp;
-        childti->pcb.ksp = (unsigned long) childstack;
-        childti->pcb.flags = 1; /* set FEN, clear everything else */
-
-        /* Set a new TLS for the child thread?  Peek back into the
-           syscall arguments that we saved on syscall entry.  Oops,
-           except we'd have clobbered it with the parent/child set
-           of r20.  Read the saved copy.  */
-        /* Note: if CLONE_SETTLS is not set, then we must inherit the
-           value from the parent, which will have been set by the block
-           copy in dup_task_struct.  This is non-intuitive, but is
-           required for proper operation in the case of a threaded
-           application calling fork.  */
-        if (clone_flags & CLONE_SETTLS)
-                childti->pcb.unique = settls;
-
         return 0;
 }
 
diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c
index 32575f85507d..336393c9c11f 100644
--- a/arch/alpha/kernel/signal.c
+++ b/arch/alpha/kernel/signal.c
@@ -160,10 +160,10 @@ extern char compile_time_assert
 #define INSN_CALLSYS            0x00000083
 
 static long
-restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
-                   struct switch_stack *sw)
+restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
 {
         unsigned long usp;
+        struct switch_stack *sw = (struct switch_stack *)regs - 1;
         long i, err = __get_user(regs->pc, &sc->sc_pc);
 
         current_thread_info()->restart_block.fn = do_no_restart_syscall;
@@ -215,9 +215,9 @@ restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
    registers and transfer control from userland.  */
 
 asmlinkage void
-do_sigreturn(struct sigcontext __user *sc, struct pt_regs *regs,
-             struct switch_stack *sw)
+do_sigreturn(struct sigcontext __user *sc)
 {
+        struct pt_regs *regs = current_pt_regs();
         sigset_t set;
 
         /* Verify that it's a good sigcontext before using it */
@@ -228,7 +228,7 @@ do_sigreturn(struct sigcontext __user *sc, struct pt_regs *regs,
 
         set_current_blocked(&set);
 
-        if (restore_sigcontext(sc, regs, sw))
+        if (restore_sigcontext(sc, regs))
                 goto give_sigsegv;
 
         /* Send SIGTRAP if we're single-stepping: */
@@ -249,9 +249,9 @@ give_sigsegv:
 }
 
 asmlinkage void
-do_rt_sigreturn(struct rt_sigframe __user *frame, struct pt_regs *regs,
-                struct switch_stack *sw)
+do_rt_sigreturn(struct rt_sigframe __user *frame)
 {
+        struct pt_regs *regs = current_pt_regs();
         sigset_t set;
 
         /* Verify that it's a good ucontext_t before using it */
@@ -262,7 +262,7 @@ do_rt_sigreturn(struct rt_sigframe __user *frame, struct pt_regs *regs,
 
         set_current_blocked(&set);
 
-        if (restore_sigcontext(&frame->uc.uc_mcontext, regs, sw))
+        if (restore_sigcontext(&frame->uc.uc_mcontext, regs))
                 goto give_sigsegv;
 
         /* Send SIGTRAP if we're single-stepping: */
diff --git a/arch/alpha/kernel/srmcons.c b/arch/alpha/kernel/srmcons.c
index 5d5865204a1d..59b7bbad8394 100644
--- a/arch/alpha/kernel/srmcons.c
+++ b/arch/alpha/kernel/srmcons.c
@@ -205,7 +205,6 @@ static const struct tty_operations srmcons_ops = {
 static int __init
 srmcons_init(void)
 {
-        tty_port_init(&srmcons_singleton.port);
         setup_timer(&srmcons_singleton.timer, srmcons_receive_chars,
                         (unsigned long)&srmcons_singleton);
         if (srm_is_registered_console) {
@@ -215,6 +214,9 @@ srmcons_init(void)
                 driver = alloc_tty_driver(MAX_SRM_CONSOLE_DEVICES);
                 if (!driver)
                         return -ENOMEM;
+
+                tty_port_init(&srmcons_singleton.port);
+
                 driver->driver_name = "srm";
                 driver->name = "srm";
                 driver->major = 0;      /* dynamic */
@@ -227,6 +229,7 @@ srmcons_init(void)
                 err = tty_register_driver(driver);
                 if (err) {
                         put_tty_driver(driver);
+                        tty_port_destroy(&srmcons_singleton.port);
                         return err;
                 }
                 srmcons_driver = driver;
diff --git a/arch/alpha/kernel/systbls.S b/arch/alpha/kernel/systbls.S
index 2ac6b45c3e00..4284ec798ec9 100644
--- a/arch/alpha/kernel/systbls.S
+++ b/arch/alpha/kernel/systbls.S
@@ -12,7 +12,7 @@
 sys_call_table:
         .quad alpha_ni_syscall                  /* 0 */
         .quad sys_exit
-        .quad sys_fork
+        .quad alpha_fork
         .quad sys_read
         .quad sys_write
         .quad alpha_ni_syscall                  /* 5 */
@@ -76,7 +76,7 @@ sys_call_table:
         .quad sys_getpgrp
         .quad sys_getpagesize
         .quad alpha_ni_syscall                  /* 65 */
-        .quad sys_vfork
+        .quad alpha_vfork
         .quad sys_newstat
         .quad sys_newlstat
         .quad alpha_ni_syscall
@@ -330,7 +330,7 @@ sys_call_table:
         .quad sys_ni_syscall                    /* 309: old get_kernel_syms */
         .quad sys_syslog                        /* 310 */
         .quad sys_reboot
-        .quad sys_clone
+        .quad alpha_clone
         .quad sys_uselib
         .quad sys_mlock
         .quad sys_munlock                       /* 315 */