Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c7e872e7da5514d014707a407ea562d197cc0136
Commit: c7e872e7da5514d014707a407ea562d197cc0136
Parent: b351d164e860d1ffffdc501c32f55dd1446c385b
Author: Peter Zijlstra <[EMAIL PROTECTED]>
AuthorDate: Thu Oct 11 22:11:12 2007 +0200
Committer: Peter Zijlstra <[EMAIL PROTECTED]>
CommitDate: Thu Oct 11 22:11:12 2007 +0200
lockdep: i386: connect the sysexit hook
Run the lockdep_sys_exit hook after all other C code on the syscall
return path.
Signed-off-by: Peter Zijlstra <[EMAIL PROTECTED]>
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
---
arch/x86/kernel/entry_32.S | 4 ++++
include/asm-x86/irqflags_32.h | 13 +++++++++++++
2 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 290b7bc..8099fea 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -251,6 +251,7 @@ check_userspace:
jb resume_kernel # not returning to v8086 or userspace
ENTRY(resume_userspace)
+ LOCKDEP_SYS_EXIT
DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
# setting need_resched or sigpending
# between sampling and the iret
@@ -338,6 +339,7 @@ sysenter_past_esp:
jae syscall_badsys
call *sys_call_table(,%eax,4)
movl %eax,PT_EAX(%esp)
+ LOCKDEP_SYS_EXIT
DISABLE_INTERRUPTS(CLBR_ANY)
TRACE_IRQS_OFF
movl TI_flags(%ebp), %ecx
@@ -377,6 +379,7 @@ syscall_call:
call *sys_call_table(,%eax,4)
movl %eax,PT_EAX(%esp) # store the return value
syscall_exit:
+ LOCKDEP_SYS_EXIT
DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
# setting need_resched or sigpending
# between sampling and the iret
@@ -467,6 +470,7 @@ work_pending:
jz work_notifysig
work_resched:
call schedule
+ LOCKDEP_SYS_EXIT
DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
# setting need_resched or sigpending
# between sampling and the iret
diff --git a/include/asm-x86/irqflags_32.h b/include/asm-x86/irqflags_32.h
index eff8585..d058b04 100644
--- a/include/asm-x86/irqflags_32.h
+++ b/include/asm-x86/irqflags_32.h
@@ -160,4 +160,17 @@ static inline int raw_irqs_disabled(void)
# define TRACE_IRQS_OFF
#endif
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# define LOCKDEP_SYS_EXIT \
+ pushl %eax; \
+ pushl %ecx; \
+ pushl %edx; \
+ call lockdep_sys_exit; \
+ popl %edx; \
+ popl %ecx; \
+ popl %eax;
+#else
+# define LOCKDEP_SYS_EXIT
+#endif
+
#endif
-
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