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Message-Id: <20080329001418.D5F3526FA1D@magilla.localdomain> Date: Fri, 28 Mar 2008 17:14:18 -0700 (PDT) From: Roland McGrath <roland@...hat.com> To: Andrew Morton <akpm@...ux-foundation.org>, Linus Torvalds <torvalds@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org Subject: [PATCH 3/4] s390 renumber TIF_RESTORE_SIGMASK TIF_RESTORE_SIGMASK no longer needs to be in the _TIF_WORK_* masks. Those low bits are scarce, and are all used up now. Renumber TIF_RESTORE_SIGMASK to free one up. Signed-off-by: Roland McGrath <roland@...hat.com> --- arch/s390/kernel/entry.S | 14 +++++++------- arch/s390/kernel/entry64.S | 12 ++++++------ include/asm-s390/thread_info.h | 2 +- 3 files changed, 14 insertions(+), 14 deletions(-) diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 6766e37..bdbb3bc 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -49,9 +49,9 @@ SP_ILC = STACK_FRAME_OVERHEAD + __PT_ILC SP_TRAP = STACK_FRAME_OVERHEAD + __PT_TRAP SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE -_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | _TIF_NEED_RESCHED | \ +_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP ) -_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | _TIF_NEED_RESCHED | \ +_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ _TIF_MCCK_PENDING) STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER @@ -316,7 +316,7 @@ sysc_work: bo BASED(sysc_mcck_pending) tm __TI_flags+3(%r9),_TIF_NEED_RESCHED bo BASED(sysc_reschedule) - tm __TI_flags+3(%r9),(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK) + tm __TI_flags+3(%r9),_TIF_SIGPENDING bnz BASED(sysc_sigpending) tm __TI_flags+3(%r9),_TIF_RESTART_SVC bo BASED(sysc_restart) @@ -342,7 +342,7 @@ sysc_mcck_pending: br %r1 # TIF bit will be cleared by handler # -# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal +# _TIF_SIGPENDING is set, call do_signal # sysc_sigpending: ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP @@ -657,7 +657,7 @@ io_work: lr %r15,%r1 # # One of the work bits is on. Find out which one. -# Checked are: _TIF_SIGPENDING, _TIF_RESTORE_SIGMASK, _TIF_NEED_RESCHED +# Checked are: _TIF_SIGPENDING, _TIF_NEED_RESCHED # and _TIF_MCCK_PENDING # io_work_loop: @@ -665,7 +665,7 @@ io_work_loop: bo BASED(io_mcck_pending) tm __TI_flags+3(%r9),_TIF_NEED_RESCHED bo BASED(io_reschedule) - tm __TI_flags+3(%r9),(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK) + tm __TI_flags+3(%r9),_TIF_SIGPENDING bnz BASED(io_sigpending) b BASED(io_restore) io_work_done: @@ -693,7 +693,7 @@ io_reschedule: b BASED(io_work_loop) # -# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal +# _TIF_SIGPENDING is set, call do_signal # io_sigpending: TRACE_IRQS_ON diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S index efde6e1..0338579 100644 --- a/arch/s390/kernel/entry64.S +++ b/arch/s390/kernel/entry64.S @@ -52,9 +52,9 @@ SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER STACK_SIZE = 1 << STACK_SHIFT -_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | _TIF_NEED_RESCHED | \ +_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP ) -_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | _TIF_NEED_RESCHED | \ +_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ _TIF_MCCK_PENDING) #define BASED(name) name-system_call(%r13) @@ -308,7 +308,7 @@ sysc_work: jo sysc_mcck_pending tm __TI_flags+7(%r9),_TIF_NEED_RESCHED jo sysc_reschedule - tm __TI_flags+7(%r9),(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK) + tm __TI_flags+7(%r9),_TIF_SIGPENDING jnz sysc_sigpending tm __TI_flags+7(%r9),_TIF_RESTART_SVC jo sysc_restart @@ -332,7 +332,7 @@ sysc_mcck_pending: jg s390_handle_mcck # TIF bit will be cleared by handler # -# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal +# _TIF_SIGPENDING is set, call do_signal # sysc_sigpending: ni __TI_flags+7(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP @@ -647,7 +647,7 @@ io_work_loop: jo io_mcck_pending tm __TI_flags+7(%r9),_TIF_NEED_RESCHED jo io_reschedule - tm __TI_flags+7(%r9),(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK) + tm __TI_flags+7(%r9),_TIF_SIGPENDING jnz io_sigpending j io_restore io_work_done: @@ -673,7 +673,7 @@ io_reschedule: j io_work_loop # -# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal +# _TIF_SIGPENDING or is set, call do_signal # io_sigpending: TRACE_IRQS_ON diff --git a/include/asm-s390/thread_info.h b/include/asm-s390/thread_info.h index 0a51891..99bbed9 100644 --- a/include/asm-s390/thread_info.h +++ b/include/asm-s390/thread_info.h @@ -89,7 +89,6 @@ static inline struct thread_info *current_thread_info(void) * thread information flags bit numbers */ #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ -#define TIF_RESTORE_SIGMASK 1 /* restore signal mask in do_signal() */ #define TIF_SIGPENDING 2 /* signal pending */ #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ #define TIF_RESTART_SVC 4 /* restart svc with new svc number */ @@ -101,6 +100,7 @@ static inline struct thread_info *current_thread_info(void) TIF_NEED_RESCHED */ #define TIF_31BIT 18 /* 32bit process */ #define TIF_MEMDIE 19 +#define TIF_RESTORE_SIGMASK 20 /* restore signal mask in do_signal() */ #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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