Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Use a TS_RESTORE_SIGMASK
  lmb: Make lmb debugging more useful.
  lmb: Fix inconsistent alignment of size argument.
  sparc: Fix mremap address range validation.

6 files changed, 31 insertions, 126 deletions

diff --git a/arch/sparc/kernel/sys_sparc.c b/arch/sparc/kernel/sys_sparc.c
index e995491c4436..3c6b49a53ae8 100644
--- a/arch/sparc/kernel/sys_sparc.c
+++ b/arch/sparc/kernel/sys_sparc.c
@@ -219,7 +219,7 @@ out:
 	return err;
 }
 
-int sparc_mmap_check(unsigned long addr, unsigned long len, unsigned long flags)
+int sparc_mmap_check(unsigned long addr, unsigned long len)
 {
 	if (ARCH_SUN4C_SUN4 &&
 	    (len > 0x20000000 ||
@@ -295,52 +295,14 @@ asmlinkage unsigned long sparc_mremap(unsigned long addr,
 	unsigned long old_len, unsigned long new_len,
 	unsigned long flags, unsigned long new_addr)
 {
-	struct vm_area_struct *vma;
 	unsigned long ret = -EINVAL;
-	if (ARCH_SUN4C_SUN4) {
-		if (old_len > 0x20000000 || new_len > 0x20000000)
-			goto out;
-		if (addr < 0xe0000000 && addr + old_len > 0x20000000)
-			goto out;
-	}
-	if (old_len > TASK_SIZE - PAGE_SIZE ||
-	    new_len > TASK_SIZE - PAGE_SIZE)
+
+	if (unlikely(sparc_mmap_check(addr, old_len)))
+		goto out;
+	if (unlikely(sparc_mmap_check(new_addr, new_len)))
 		goto out;
 	down_write(&current->mm->mmap_sem);
-	if (flags & MREMAP_FIXED) {
-		if (ARCH_SUN4C_SUN4 &&
-		    new_addr < 0xe0000000 &&
-		    new_addr + new_len > 0x20000000)
-			goto out_sem;
-		if (new_addr + new_len > TASK_SIZE - PAGE_SIZE)
-			goto out_sem;
-	} else if ((ARCH_SUN4C_SUN4 && addr < 0xe0000000 &&
-		    addr + new_len > 0x20000000) ||
-		   addr + new_len > TASK_SIZE - PAGE_SIZE) {
-		unsigned long map_flags = 0;
-		struct file *file = NULL;
-
-		ret = -ENOMEM;
-		if (!(flags & MREMAP_MAYMOVE))
-			goto out_sem;
-
-		vma = find_vma(current->mm, addr);
-		if (vma) {
-			if (vma->vm_flags & VM_SHARED)
-				map_flags |= MAP_SHARED;
-			file = vma->vm_file;
-		}
-
-		new_addr = get_unmapped_area(file, addr, new_len,
-				     vma ? vma->vm_pgoff : 0,
-				     map_flags);
-		ret = new_addr;
-		if (new_addr & ~PAGE_MASK)
-			goto out_sem;
-		flags |= MREMAP_FIXED;
-	}
 	ret = do_mremap(addr, old_len, new_len, flags, new_addr);
-out_sem:
 	up_write(&current->mm->mmap_sem);
 out:
 	return ret;       
diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S
index b9b785fd8b46..16689b2930db 100644
--- a/arch/sparc64/kernel/rtrap.S
+++ b/arch/sparc64/kernel/rtrap.S
@@ -46,7 +46,7 @@ __handle_user_windows:
 		wrpr			%g0, RTRAP_PSTATE_IRQOFF, %pstate
 		ldx			[%g6 + TI_FLAGS], %l0
 
-1:		andcc			%l0, (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), %g0
+1:		andcc			%l0, _TIF_SIGPENDING, %g0
 		be,pt			%xcc, __handle_user_windows_continue
 		 nop
 		mov			%l5, %o1
@@ -86,7 +86,7 @@ __handle_perfctrs:
 		 wrpr			%g0, RTRAP_PSTATE, %pstate
 		wrpr			%g0, RTRAP_PSTATE_IRQOFF, %pstate
 		ldx			[%g6 + TI_FLAGS], %l0
-1:		andcc			%l0, (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), %g0
+1:		andcc			%l0, _TIF_SIGPENDING, %g0
 
 		be,pt			%xcc, __handle_perfctrs_continue
 		 sethi			%hi(TSTATE_PEF), %o0
@@ -195,7 +195,7 @@ __handle_preemption_continue:
 		 andcc			%l1, %o0, %g0
 		andcc			%l0, _TIF_NEED_RESCHED, %g0
 		bne,pn			%xcc, __handle_preemption
-		 andcc			%l0, (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), %g0
+		 andcc			%l0, _TIF_SIGPENDING, %g0
 		bne,pn			%xcc, __handle_signal
 __handle_signal_continue:
 		 ldub			[%g6 + TI_WSAVED], %o2
diff --git a/arch/sparc64/kernel/signal.c b/arch/sparc64/kernel/signal.c
index 2378482c2aab..6e4dc67d16af 100644
--- a/arch/sparc64/kernel/signal.c
+++ b/arch/sparc64/kernel/signal.c
@@ -247,7 +247,9 @@ static long _sigpause_common(old_sigset_t set)
 
 	current->state = TASK_INTERRUPTIBLE;
 	schedule();
-	set_thread_flag(TIF_RESTORE_SIGMASK);
+
+	set_restore_sigmask();
+
 	return -ERESTARTNOHAND;
 }
 
@@ -537,7 +539,7 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 	} else
 		restart_syscall = 0;
 
-	if (test_thread_flag(TIF_RESTORE_SIGMASK))
+	if (current_thread_info()->status & TS_RESTORE_SIGMASK)
 		oldset = &current->saved_sigmask;
 	else
 		oldset = &current->blocked;
@@ -566,13 +568,12 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 			syscall_restart(orig_i0, regs, &ka.sa);
 		handle_signal(signr, &ka, &info, oldset, regs);
 
-		/* a signal was successfully delivered; the saved
+		/* A signal was successfully delivered; the saved
 		 * sigmask will have been stored in the signal frame,
 		 * and will be restored by sigreturn, so we can simply
-		 * clear the TIF_RESTORE_SIGMASK flag.
+		 * clear the TS_RESTORE_SIGMASK flag.
 		 */
-		if (test_thread_flag(TIF_RESTORE_SIGMASK))
-			clear_thread_flag(TIF_RESTORE_SIGMASK);
+		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
 		return;
 	}
 	if (restart_syscall &&
@@ -591,17 +592,17 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 		regs->tnpc -= 4;
 	}
 
-	/* if there's no signal to deliver, we just put the saved sigmask
+	/* If there's no signal to deliver, we just put the saved sigmask
 	 * back
 	 */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
+	if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
 		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
 	}
 }
 
 void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long thread_info_flags)
 {
-	if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
+	if (thread_info_flags & _TIF_SIGPENDING)
 		do_signal(regs, orig_i0);
 }
diff --git a/arch/sparc64/kernel/signal32.c b/arch/sparc64/kernel/signal32.c
index 3f19e9af3d1b..97cdd1bf4a10 100644
--- a/arch/sparc64/kernel/signal32.c
+++ b/arch/sparc64/kernel/signal32.c
@@ -788,13 +788,12 @@ void do_signal32(sigset_t *oldset, struct pt_regs * regs,
 			syscall_restart32(orig_i0, regs, &ka.sa);
 		handle_signal32(signr, &ka, &info, oldset, regs);
 
-		/* a signal was successfully delivered; the saved
+		/* A signal was successfully delivered; the saved
 		 * sigmask will have been stored in the signal frame,
 		 * and will be restored by sigreturn, so we can simply
-		 * clear the TIF_RESTORE_SIGMASK flag.
+		 * clear the TS_RESTORE_SIGMASK flag.
 		 */
-		if (test_thread_flag(TIF_RESTORE_SIGMASK))
-			clear_thread_flag(TIF_RESTORE_SIGMASK);
+		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
 		return;
 	}
 	if (restart_syscall &&
@@ -813,11 +812,11 @@ void do_signal32(sigset_t *oldset, struct pt_regs * regs,
 		regs->tnpc -= 4;
 	}
 
-	/* if there's no signal to deliver, we just put the saved sigmask
+	/* If there's no signal to deliver, we just put the saved sigmask
 	 * back
 	 */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
+	if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
 		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
 	}
 }
diff --git a/arch/sparc64/kernel/sys_sparc.c b/arch/sparc64/kernel/sys_sparc.c
index 0dbc941f130e..ac1bff58c1ac 100644
--- a/arch/sparc64/kernel/sys_sparc.c
+++ b/arch/sparc64/kernel/sys_sparc.c
@@ -542,8 +542,7 @@ asmlinkage long sparc64_personality(unsigned long personality)
 	return ret;
 }
 
-int sparc64_mmap_check(unsigned long addr, unsigned long len,
-		unsigned long flags)
+int sparc64_mmap_check(unsigned long addr, unsigned long len)
 {
 	if (test_thread_flag(TIF_32BIT)) {
 		if (len >= STACK_TOP32)
@@ -609,46 +608,19 @@ asmlinkage unsigned long sys64_mremap(unsigned long addr,
 	unsigned long old_len, unsigned long new_len,
 	unsigned long flags, unsigned long new_addr)
 {
-	struct vm_area_struct *vma;
 	unsigned long ret = -EINVAL;
 
 	if (test_thread_flag(TIF_32BIT))
 		goto out;
 	if (unlikely(new_len >= VA_EXCLUDE_START))
 		goto out;
-	if (unlikely(invalid_64bit_range(addr, old_len)))
+	if (unlikely(sparc64_mmap_check(addr, old_len)))
+		goto out;
+	if (unlikely(sparc64_mmap_check(new_addr, new_len)))
 		goto out;
 
 	down_write(&current->mm->mmap_sem);
-	if (flags & MREMAP_FIXED) {
-		if (invalid_64bit_range(new_addr, new_len))
-			goto out_sem;
-	} else if (invalid_64bit_range(addr, new_len)) {
-		unsigned long map_flags = 0;
-		struct file *file = NULL;
-
-		ret = -ENOMEM;
-		if (!(flags & MREMAP_MAYMOVE))
-			goto out_sem;
-
-		vma = find_vma(current->mm, addr);
-		if (vma) {
-			if (vma->vm_flags & VM_SHARED)
-				map_flags |= MAP_SHARED;
-			file = vma->vm_file;
-		}
-
-		/* MREMAP_FIXED checked above. */
-		new_addr = get_unmapped_area(file, addr, new_len,
-				    vma ? vma->vm_pgoff : 0,
-				    map_flags);
-		ret = new_addr;
-		if (new_addr & ~PAGE_MASK)
-			goto out_sem;
-		flags |= MREMAP_FIXED;
-	}
 	ret = do_mremap(addr, old_len, new_len, flags, new_addr);
-out_sem:
 	up_write(&current->mm->mmap_sem);
 out:
 	return ret;       
diff --git a/arch/sparc64/kernel/sys_sparc32.c b/arch/sparc64/kernel/sys_sparc32.c
index 1aa4288125f2..ba5bd626b39e 100644
--- a/arch/sparc64/kernel/sys_sparc32.c
+++ b/arch/sparc64/kernel/sys_sparc32.c
@@ -867,44 +867,15 @@ asmlinkage unsigned long sys32_mremap(unsigned long addr,
 	unsigned long old_len, unsigned long new_len,
 	unsigned long flags, u32 __new_addr)
 {
-	struct vm_area_struct *vma;
 	unsigned long ret = -EINVAL;
 	unsigned long new_addr = __new_addr;
 
-	if (old_len > STACK_TOP32 || new_len > STACK_TOP32)
+	if (unlikely(sparc64_mmap_check(addr, old_len)))
 		goto out;
-	if (addr > STACK_TOP32 - old_len)
+	if (unlikely(sparc64_mmap_check(new_addr, new_len)))
 		goto out;
 	down_write(&current->mm->mmap_sem);
-	if (flags & MREMAP_FIXED) {
-		if (new_addr > STACK_TOP32 - new_len)
-			goto out_sem;
-	} else if (addr > STACK_TOP32 - new_len) {
-		unsigned long map_flags = 0;
-		struct file *file = NULL;
-
-		ret = -ENOMEM;
-		if (!(flags & MREMAP_MAYMOVE))
-			goto out_sem;
-
-		vma = find_vma(current->mm, addr);
-		if (vma) {
-			if (vma->vm_flags & VM_SHARED)
-				map_flags |= MAP_SHARED;
-			file = vma->vm_file;
-		}
-
-		/* MREMAP_FIXED checked above. */
-		new_addr = get_unmapped_area(file, addr, new_len,
-				    vma ? vma->vm_pgoff : 0,
-				    map_flags);
-		ret = new_addr;
-		if (new_addr & ~PAGE_MASK)
-			goto out_sem;
-		flags |= MREMAP_FIXED;
-	}
 	ret = do_mremap(addr, old_len, new_len, flags, new_addr);
-out_sem:
 	up_write(&current->mm->mmap_sem);
 out:
 	return ret;