diff options
| author | Roland McGrath <roland@redhat.com> | 2008-04-30 00:53:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:37 -0700 |
| commit | 5a8da0ea82db6fa9737041381079fd16f25dcce2 (patch) | |
| tree | abd26177c0a965315de290e1e9602d087b78f149 /include/asm-x86 | |
| parent | f3de272b821accbc8387211977c2de4f38468d05 (diff) | |
signals: x86 TS_RESTORE_SIGMASK
Replace TIF_RESTORE_SIGMASK with TS_RESTORE_SIGMASK and define our own
set_restore_sigmask() function. This saves the costly SMP-safe set_bit
operation, which we do not need for the sigmask flag since TIF_SIGPENDING
always has to be set too.
Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-x86')
| -rw-r--r-- | include/asm-x86/thread_info_32.h | 13 | ||||
| -rw-r--r-- | include/asm-x86/thread_info_64.h | 13 |
2 files changed, 22 insertions, 4 deletions
diff --git a/include/asm-x86/thread_info_32.h b/include/asm-x86/thread_info_32.h index 531859962096..b6338829d1a8 100644 --- a/include/asm-x86/thread_info_32.h +++ b/include/asm-x86/thread_info_32.h @@ -131,7 +131,6 @@ static inline struct thread_info *current_thread_info(void) #define TIF_SYSCALL_EMU 5 /* syscall emulation active */ #define TIF_SYSCALL_AUDIT 6 /* syscall auditing active */ #define TIF_SECCOMP 7 /* secure computing */ -#define TIF_RESTORE_SIGMASK 8 /* restore signal mask in do_signal() */ #define TIF_HRTICK_RESCHED 9 /* reprogram hrtick timer */ #define TIF_MEMDIE 16 #define TIF_DEBUG 17 /* uses debug registers */ @@ -151,7 +150,6 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU) #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) #define _TIF_SECCOMP (1 << TIF_SECCOMP) -#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) #define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED) #define _TIF_DEBUG (1 << TIF_DEBUG) #define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP) @@ -188,9 +186,20 @@ static inline struct thread_info *current_thread_info(void) this quantum (SMP) */ #define TS_POLLING 0x0002 /* True if in idle loop and not sleeping */ +#define TS_RESTORE_SIGMASK 0x0004 /* restore signal mask in do_signal() */ #define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING) +#ifndef __ASSEMBLY__ +#define HAVE_SET_RESTORE_SIGMASK 1 +static inline void set_restore_sigmask(void) +{ + struct thread_info *ti = current_thread_info(); + ti->status |= TS_RESTORE_SIGMASK; + set_bit(TIF_SIGPENDING, &ti->flags); +} +#endif /* !__ASSEMBLY__ */ + #endif /* __KERNEL__ */ #endif /* _ASM_THREAD_INFO_H */ diff --git a/include/asm-x86/thread_info_64.h b/include/asm-x86/thread_info_64.h index ed664e874dec..cb69f70abba1 100644 --- a/include/asm-x86/thread_info_64.h +++ b/include/asm-x86/thread_info_64.h @@ -109,7 +109,6 @@ static inline struct thread_info *stack_thread_info(void) #define TIF_IRET 5 /* force IRET */ #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ #define TIF_SECCOMP 8 /* secure computing */ -#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal */ #define TIF_MCE_NOTIFY 10 /* notify userspace of an MCE */ #define TIF_HRTICK_RESCHED 11 /* reprogram hrtick timer */ /* 16 free */ @@ -133,7 +132,6 @@ static inline struct thread_info *stack_thread_info(void) #define _TIF_IRET (1 << TIF_IRET) #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) #define _TIF_SECCOMP (1 << TIF_SECCOMP) -#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) #define _TIF_MCE_NOTIFY (1 << TIF_MCE_NOTIFY) #define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED) #define _TIF_IA32 (1 << TIF_IA32) @@ -178,9 +176,20 @@ static inline struct thread_info *stack_thread_info(void) #define TS_COMPAT 0x0002 /* 32bit syscall active */ #define TS_POLLING 0x0004 /* true if in idle loop and not sleeping */ +#define TS_RESTORE_SIGMASK 0x0008 /* restore signal mask in do_signal() */ #define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING) +#ifndef __ASSEMBLY__ +#define HAVE_SET_RESTORE_SIGMASK 1 +static inline void set_restore_sigmask(void) +{ + struct thread_info *ti = current_thread_info(); + ti->status |= TS_RESTORE_SIGMASK; + set_bit(TIF_SIGPENDING, &ti->flags); +} +#endif /* !__ASSEMBLY__ */ + #endif /* __KERNEL__ */ #endif /* _ASM_THREAD_INFO_H */ |