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authorDavid Howells <dhowells@redhat.com>2010-10-27 20:29:01 +0400
committerDavid Howells <dhowells@redhat.com>2010-10-27 20:29:01 +0400
commit7c7fcf762e405eb040ee10d22d656a791f616122 (patch)
tree2ec4f320fe2d348ffbdab6aebc9a36bcbf13da34 /arch/mn10300/kernel/signal.c
parenta5e03ca2fd57a5823b759981bff8d19b46ddad4d (diff)
downloadlinux-7c7fcf762e405eb040ee10d22d656a791f616122.tar.xz
MN10300: Save frame pointer in thread_info struct rather than global var
Save the current exception frame pointer in the thread_info struct rather than in a global variable as the latter makes SMP tricky, especially when preemption is also enabled. This also replaces __frame with current_frame() and rearranges header file inclusions to make it all compile. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Diffstat (limited to 'arch/mn10300/kernel/signal.c')
-rw-r--r--arch/mn10300/kernel/signal.c20
1 files changed, 11 insertions, 9 deletions
diff --git a/arch/mn10300/kernel/signal.c b/arch/mn10300/kernel/signal.c
index d4de05ab7864..690f4e9507d7 100644
--- a/arch/mn10300/kernel/signal.c
+++ b/arch/mn10300/kernel/signal.c
@@ -91,7 +91,7 @@ asmlinkage long sys_sigaction(int sig,
*/
asmlinkage long sys_sigaltstack(const stack_t __user *uss, stack_t *uoss)
{
- return do_sigaltstack(uss, uoss, __frame->sp);
+ return do_sigaltstack(uss, uoss, current_frame()->sp);
}
/*
@@ -156,10 +156,11 @@ badframe:
*/
asmlinkage long sys_sigreturn(void)
{
- struct sigframe __user *frame = (struct sigframe __user *) __frame->sp;
+ struct sigframe __user *frame;
sigset_t set;
long d0;
+ frame = (struct sigframe __user *) current_frame()->sp;
if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__get_user(set.sig[0], &frame->sc.oldmask))
@@ -176,7 +177,7 @@ asmlinkage long sys_sigreturn(void)
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
- if (restore_sigcontext(__frame, &frame->sc, &d0))
+ if (restore_sigcontext(current_frame(), &frame->sc, &d0))
goto badframe;
return d0;
@@ -191,11 +192,11 @@ badframe:
*/
asmlinkage long sys_rt_sigreturn(void)
{
- struct rt_sigframe __user *frame =
- (struct rt_sigframe __user *) __frame->sp;
+ struct rt_sigframe __user *frame;
sigset_t set;
- unsigned long d0;
+ long d0;
+ frame = (struct rt_sigframe __user *) current_frame()->sp;
if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
@@ -207,10 +208,11 @@ asmlinkage long sys_rt_sigreturn(void)
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
- if (restore_sigcontext(__frame, &frame->uc.uc_mcontext, &d0))
+ if (restore_sigcontext(current_frame(), &frame->uc.uc_mcontext, &d0))
goto badframe;
- if (do_sigaltstack(&frame->uc.uc_stack, NULL, __frame->sp) == -EFAULT)
+ if (do_sigaltstack(&frame->uc.uc_stack, NULL, current_frame()->sp) ==
+ -EFAULT)
goto badframe;
return d0;
@@ -572,7 +574,7 @@ asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags)
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
- tracehook_notify_resume(__frame);
+ tracehook_notify_resume(current_frame());
if (current->replacement_session_keyring)
key_replace_session_keyring();
}