From: Andrew Morton <akpm@linux-foundation.org>
To: eranian@hpl.hp.com
Cc: linux-kernel@vger.kernel.org, ak@suse.de,
linux-ia64@vger.kernel.org, tony.luck@intel.com
Subject: Re: [PATCH] remove unused TIF_NOTIFY_RESUME (take 2)
Date: Mon, 30 Jul 2007 17:21:15 +0000 [thread overview]
Message-ID: <20070730102115.cac237ea.akpm@linux-foundation.org> (raw)
In-Reply-To: <20070730093034.GD25162@frankl.hpl.hp.com>
On Mon, 30 Jul 2007 02:30:34 -0700 Stephane Eranian <eranian@hpl.hp.com> wrote:
> This following patch removes the TIF_NOTIFY_RESUME flag for thread_info. It is unused
> on all but the IA-64 architecture. This is take 2 of this patch. In this version,
> The definition is removed but no re-numbering of the TIF flags is done to minimize
> the possibility of errors and reduce the size of the patch.
>
> For IA-64, we ran out of low-order bits (first 7 bits). Adding a bit for perfmon
> would cause important code rescheduling changes in the kernel entry/exit path. Instead,
> we replace TIF_NOTIFY_RESUME with TIF_PERFMON_WORK. This way we get very close to what the
> new perfmon code base is doing.
This has been (painfully) maintained in -mm for quite a long time. I've
been waiting for everyone else to merge their stuff so I can get it in
without disrupting them. This has now happened.
I think it'd be better to merge the larger patch - it's a bit tidier and
more tested, OK?
From: Stephane Eranian <eranian@hpl.hp.com>
Remove unused TIF_NOTIFY_RESUME flag for all processor architectures. The
flag was not used excecpt on IA-64 where the patch replaces it with
TIF_PERFMON_WORK.
Signed-off-by: stephane eranian <eranian@hpl.hp.com>
Cc: <linux-arch@vger.kernel.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/arm/kernel/entry-common.S | 2 -
arch/arm26/kernel/entry.S | 2 -
arch/ia64/kernel/perfmon.c | 4 +-
arch/powerpc/kernel/entry_64.S | 1
arch/x86_64/kernel/entry.S | 6 ++--
include/asm-alpha/thread_info.h | 24 +++++++----------
include/asm-arm/thread_info.h | 7 +----
include/asm-arm26/thread_info.h | 7 +----
include/asm-avr32/thread_info.h | 18 +++++--------
include/asm-blackfin/thread_info.h | 14 ++++------
include/asm-cris/thread_info.h | 6 +---
include/asm-frv/thread_info.h | 12 +++-----
include/asm-h8300/thread_info.h | 12 +++-----
include/asm-i386/thread_info.h | 18 +++++--------
include/asm-ia64/thread_info.h | 20 +++++++-------
include/asm-m32r/thread_info.h | 10 ++-----
include/asm-m68knommu/thread_info.h | 10 ++-----
include/asm-mips/thread_info.h | 10 ++-----
include/asm-parisc/thread_info.h | 16 +++++------
include/asm-powerpc/thread_info.h | 36 ++++++++++++--------------
include/asm-sh/thread_info.h | 10 ++-----
include/asm-v850/thread_info.h | 10 ++-----
include/asm-x86_64/thread_info.h | 2 -
include/asm-xtensa/thread_info.h | 14 ++++------
24 files changed, 116 insertions(+), 155 deletions(-)
diff -puN arch/arm26/kernel/entry.S~remove-unused-tif_notify_resume-flag arch/arm26/kernel/entry.S
--- a/arch/arm26/kernel/entry.S~remove-unused-tif_notify_resume-flag
+++ a/arch/arm26/kernel/entry.S
@@ -194,7 +194,7 @@ fast_work_pending:
work_pending:
tst r1, #_TIF_NEED_RESCHED
bne work_resched
- tst r1, #_TIF_NOTIFY_RESUME | _TIF_SIGPENDING
+ tst r1, #_TIF_SIGPENDING
beq no_work_pending
mov r0, sp @ 'regs'
mov r2, why @ 'syscall'
diff -puN arch/arm/kernel/entry-common.S~remove-unused-tif_notify_resume-flag arch/arm/kernel/entry-common.S
--- a/arch/arm/kernel/entry-common.S~remove-unused-tif_notify_resume-flag
+++ a/arch/arm/kernel/entry-common.S
@@ -46,7 +46,7 @@ fast_work_pending:
work_pending:
tst r1, #_TIF_NEED_RESCHED
bne work_resched
- tst r1, #_TIF_NOTIFY_RESUME | _TIF_SIGPENDING
+ tst r1, #_TIF_SIGPENDING
beq no_work_pending
mov r0, sp @ 'regs'
mov r2, why @ 'syscall'
diff -puN arch/ia64/kernel/perfmon.c~remove-unused-tif_notify_resume-flag arch/ia64/kernel/perfmon.c
--- a/arch/ia64/kernel/perfmon.c~remove-unused-tif_notify_resume-flag
+++ a/arch/ia64/kernel/perfmon.c
@@ -591,13 +591,13 @@ pfm_set_task_notify(struct task_struct *
struct thread_info *info;
info = (struct thread_info *) ((char *) task + IA64_TASK_SIZE);
- set_bit(TIF_NOTIFY_RESUME, &info->flags);
+ set_bit(TIF_PERFMON_WORK, &info->flags);
}
static inline void
pfm_clear_task_notify(void)
{
- clear_thread_flag(TIF_NOTIFY_RESUME);
+ clear_thread_flag(TIF_PERFMON_WORK);
}
static inline void
diff -puN arch/powerpc/kernel/entry_64.S~remove-unused-tif_notify_resume-flag arch/powerpc/kernel/entry_64.S
--- a/arch/powerpc/kernel/entry_64.S~remove-unused-tif_notify_resume-flag
+++ a/arch/powerpc/kernel/entry_64.S
@@ -546,7 +546,6 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISER
rfid
b . /* prevent speculative execution */
-/* Note: this must change if we start using the TIF_NOTIFY_RESUME bit */
do_work:
#ifdef CONFIG_PREEMPT
andi. r0,r3,MSR_PR /* Returning to user mode? */
diff -puN arch/x86_64/kernel/entry.S~remove-unused-tif_notify_resume-flag arch/x86_64/kernel/entry.S
--- a/arch/x86_64/kernel/entry.S~remove-unused-tif_notify_resume-flag
+++ a/arch/x86_64/kernel/entry.S
@@ -282,7 +282,7 @@ sysret_careful:
sysret_signal:
TRACE_IRQS_ON
sti
- testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
+ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
jz 1f
/* Really a signal */
@@ -375,7 +375,7 @@ int_very_careful:
jmp int_restore_rest
int_signal:
- testl $(_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
+ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
jz 1f
movq %rsp,%rdi # &ptregs -> arg1
xorl %esi,%esi # oldset -> arg2
@@ -599,7 +599,7 @@ retint_careful:
jmp retint_check
retint_signal:
- testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
+ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
jz retint_swapgs
TRACE_IRQS_ON
sti
diff -puN include/asm-alpha/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-alpha/thread_info.h
--- a/include/asm-alpha/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-alpha/thread_info.h
@@ -67,28 +67,24 @@ register struct thread_info *__current_t
* TIF_SYSCALL_TRACE is known to be 0 via blbs.
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* poll_idle is polling NEED_RESCHED */
-#define TIF_DIE_IF_KERNEL 5 /* dik recursion lock */
-#define TIF_UAC_NOPRINT 6 /* see sysinfo.h */
-#define TIF_UAC_NOFIX 7
-#define TIF_UAC_SIGBUS 8
-#define TIF_MEMDIE 9
-#define TIF_RESTORE_SIGMASK 10 /* restore signal mask in do_signal */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* poll_idle is polling NEED_RESCHED */
+#define TIF_DIE_IF_KERNEL 4 /* dik recursion lock */
+#define TIF_UAC_NOPRINT 5 /* see sysinfo.h */
+#define TIF_UAC_NOFIX 6
+#define TIF_UAC_SIGBUS 7
+#define TIF_MEMDIE 8
+#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
/* Work to do on interrupt/exception return. */
-#define _TIF_WORK_MASK (_TIF_NOTIFY_RESUME \
- | _TIF_SIGPENDING \
- | _TIF_NEED_RESCHED)
+#define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED)
/* Work to do on any return to userspace. */
#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK \
diff -puN include/asm-arm26/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-arm26/thread_info.h
--- a/include/asm-arm26/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-arm26/thread_info.h
@@ -110,21 +110,18 @@ extern void free_thread_info(struct thre
/*
* thread information flags:
* TIF_SYSCALL_TRACE - syscall trace active
- * TIF_NOTIFY_RESUME - resumption notification requested
* TIF_SIGPENDING - signal pending
* TIF_NEED_RESCHED - rescheduling necessary
* TIF_USEDFPU - FPU was used by this task this quantum (SMP)
* TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED
*/
-#define TIF_NOTIFY_RESUME 0
-#define TIF_SIGPENDING 1
-#define TIF_NEED_RESCHED 2
+#define TIF_SIGPENDING 0
+#define TIF_NEED_RESCHED 1
#define TIF_SYSCALL_TRACE 8
#define TIF_USED_FPU 16
#define TIF_POLLING_NRFLAG 17
#define TIF_MEMDIE 18
-#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
diff -puN include/asm-arm/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-arm/thread_info.h
--- a/include/asm-arm/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-arm/thread_info.h
@@ -134,22 +134,19 @@ extern void iwmmxt_task_switch(struct th
/*
* thread information flags:
* TIF_SYSCALL_TRACE - syscall trace active
- * TIF_NOTIFY_RESUME - resumption notification requested
* TIF_SIGPENDING - signal pending
* TIF_NEED_RESCHED - rescheduling necessary
* TIF_USEDFPU - FPU was used by this task this quantum (SMP)
* TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED
*/
-#define TIF_NOTIFY_RESUME 0
-#define TIF_SIGPENDING 1
-#define TIF_NEED_RESCHED 2
+#define TIF_SIGPENDING 0
+#define TIF_NEED_RESCHED 1
#define TIF_SYSCALL_TRACE 8
#define TIF_POLLING_NRFLAG 16
#define TIF_USING_IWMMXT 17
#define TIF_MEMDIE 18
#define TIF_FREEZE 19
-#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
diff -puN include/asm-avr32/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-avr32/thread_info.h
--- a/include/asm-avr32/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-avr32/thread_info.h
@@ -74,20 +74,18 @@ static inline struct thread_info *curren
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_BREAKPOINT 5 /* true if we should break after return */
-#define TIF_SINGLE_STEP 6 /* single step after next break */
-#define TIF_MEMDIE 7
-#define TIF_RESTORE_SIGMASK 8 /* restore signal mask in do_signal */
-#define TIF_CPU_GOING_TO_SLEEP 9 /* CPU is entering sleep 0 mode */
+#define TIF_BREAKPOINT 4 /* true if we should break after return */
+#define TIF_SINGLE_STEP 5 /* single step after next break */
+#define TIF_MEMDIE 6
+#define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal */
+#define TIF_CPU_GOING_TO_SLEEP 8 /* CPU is entering sleep 0 mode */
#define TIF_USERSPACE 31 /* true if FS sets userspace */
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
diff -puN include/asm-blackfin/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-blackfin/thread_info.h
--- a/include/asm-blackfin/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-blackfin/thread_info.h
@@ -118,18 +118,16 @@ static inline struct thread_info *curren
* thread information flag bit numbers
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_MEMDIE 5
-#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
-#define TIF_FREEZE 7 /* is freezing for suspend */
+#define TIF_MEMDIE 4
+#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
+#define TIF_FREEZE 6 /* is freezing for suspend */
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
diff -puN include/asm-cris/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-cris/thread_info.h
--- a/include/asm-cris/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-cris/thread_info.h
@@ -79,14 +79,12 @@ struct thread_info {
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE 17
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
diff -puN include/asm-frv/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-frv/thread_info.h
--- a/include/asm-frv/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-frv/thread_info.h
@@ -108,18 +108,16 @@ register struct thread_info *__current_t
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
-#define TIF_IRET 5 /* return with iret */
-#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */
+#define TIF_IRET 4 /* return with iret */
+#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE 17 /* OOM killer killed process */
#define TIF_FREEZE 18 /* freezing for suspend */
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
diff -puN include/asm-h8300/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-h8300/thread_info.h
--- a/include/asm-h8300/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-h8300/thread_info.h
@@ -86,17 +86,15 @@ static inline struct thread_info *curren
* thread information flag bit numbers
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_MEMDIE 5
-#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
+#define TIF_MEMDIE 4
+#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
diff -puN include/asm-i386/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-i386/thread_info.h
--- a/include/asm-i386/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-i386/thread_info.h
@@ -124,15 +124,14 @@ static inline struct thread_info *curren
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
-#define TIF_IRET 5 /* return with iret */
-#define TIF_SYSCALL_EMU 6 /* syscall emulation active */
-#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_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */
+#define TIF_IRET 4 /* return with iret */
+#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_MEMDIE 16
#define TIF_DEBUG 17 /* uses debug registers */
#define TIF_IO_BITMAP 18 /* uses I/O bitmap */
@@ -140,7 +139,6 @@ static inline struct thread_info *curren
#define TIF_NOTSC 20 /* TSC is not accessible in userland */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
diff -puN include/asm-ia64/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-ia64/thread_info.h
--- a/include/asm-ia64/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-ia64/thread_info.h
@@ -79,13 +79,13 @@ struct thread_info {
* - pending work-to-be-done flags are in least-significant 16 bits, other flags
* in top 16 bits
*/
-#define TIF_NOTIFY_RESUME 0 /* resumption notification requested */
-#define TIF_SIGPENDING 1 /* signal pending */
-#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
-#define TIF_SYSCALL_TRACE 3 /* syscall trace active */
-#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
-#define TIF_SINGLESTEP 5 /* restore singlestep on return to user mode */
-#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
+#define TIF_SIGPENDING 0 /* signal pending */
+#define TIF_NEED_RESCHED 1 /* rescheduling necessary */
+#define TIF_SYSCALL_TRACE 2 /* syscall trace active */
+#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
+#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
+#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
+#define TIF_PERFMON_WORK 6 /* work for pfm_handle_work() */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE 17
#define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
@@ -96,8 +96,8 @@ struct thread_info {
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP)
-#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
+#define _TIF_PERFMON_WORK (1 << TIF_PERFMON_WORK)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
@@ -106,7 +106,9 @@ struct thread_info {
#define _TIF_FREEZE (1 << TIF_FREEZE)
/* "work to do on user-return" bits */
-#define TIF_ALLWORK_MASK (_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_RESTORE_SIGMASK)
+#define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_PERFMON_WORK|_TIF_SYSCALL_AUDIT|\
+ _TIF_NEED_RESCHED| _TIF_SYSCALL_TRACE|\
+ _TIF_RESTORE_SIGMASK)
/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
#define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))
diff -puN include/asm-m32r/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-m32r/thread_info.h
--- a/include/asm-m32r/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-m32r/thread_info.h
@@ -146,17 +146,15 @@ static inline unsigned int get_thread_fa
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
-#define TIF_IRET 5 /* return with iret */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */
+#define TIF_IRET 4 /* return with iret */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
/* 31..28 fault code */
#define TIF_MEMDIE 17
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
diff -puN include/asm-m68knommu/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-m68knommu/thread_info.h
--- a/include/asm-m68knommu/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-m68knommu/thread_info.h
@@ -83,16 +83,14 @@ static inline struct thread_info *curren
* thread information flag bit numbers
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_MEMDIE 5
+#define TIF_MEMDIE 4
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
diff -puN include/asm-mips/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-mips/thread_info.h
--- a/include/asm-mips/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-mips/thread_info.h
@@ -109,11 +109,10 @@ register struct thread_info *__current_t
* - pending work-to-be-done flags are in LSW
* - other flags in MSW
*/
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
-#define TIF_SECCOMP 5 /* secure computing */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
+#define TIF_SECCOMP 4 /* secure computing */
#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */
@@ -122,7 +121,6 @@ register struct thread_info *__current_t
#define TIF_SYSCALL_TRACE 31 /* syscall trace active */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
diff -puN include/asm-parisc/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-parisc/thread_info.h
--- a/include/asm-parisc/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-parisc/thread_info.h
@@ -56,23 +56,21 @@ struct thread_info {
* thread information flags
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling TIF_NEED_RESCHED */
-#define TIF_32BIT 5 /* 32 bit binary */
-#define TIF_MEMDIE 6
-#define TIF_RESTORE_SIGMASK 7 /* restore saved signal mask */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling TIF_NEED_RESCHED */
+#define TIF_32BIT 4 /* 32 bit binary */
+#define TIF_MEMDIE 5
+#define TIF_RESTORE_SIGMASK 6 /* restore saved signal mask */
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_32BIT (1 << TIF_32BIT)
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
-#define _TIF_USER_WORK_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \
+#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | \
_TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
#endif /* __KERNEL__ */
diff -puN include/asm-powerpc/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-powerpc/thread_info.h
--- a/include/asm-powerpc/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-powerpc/thread_info.h
@@ -107,28 +107,26 @@ static inline struct thread_info *curren
* thread information flag bit numbers
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_32BIT 5 /* 32 bit binary */
-#define TIF_PERFMON_WORK 6 /* work for pfm_handle_work() */
-#define TIF_PERFMON_CTXSW 7 /* perfmon needs ctxsw calls */
-#define TIF_SYSCALL_AUDIT 8 /* syscall auditing active */
-#define TIF_SINGLESTEP 9 /* singlestepping active */
-#define TIF_MEMDIE 10
-#define TIF_SECCOMP 11 /* secure computing */
-#define TIF_RESTOREALL 12 /* Restore all regs (implies NOERROR) */
-#define TIF_NOERROR 14 /* Force successful syscall return */
-#define TIF_RESTORE_SIGMASK 15 /* Restore signal mask in do_signal */
-#define TIF_FREEZE 16 /* Freezing for suspend */
-#define TIF_RUNLATCH 17 /* Is the runlatch enabled? */
-#define TIF_ABI_PENDING 18 /* 32/64 bit switch needed */
+#define TIF_32BIT 4 /* 32 bit binary */
+#define TIF_PERFMON_WORK 5 /* work for pfm_handle_work() */
+#define TIF_PERFMON_CTXSW 6 /* perfmon needs ctxsw calls */
+#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
+#define TIF_SINGLESTEP 8 /* singlestepping active */
+#define TIF_MEMDIE 9
+#define TIF_SECCOMP 10 /* secure computing */
+#define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */
+#define TIF_NOERROR 12 /* Force successful syscall return */
+#define TIF_RESTORE_SIGMASK 13 /* Restore signal mask in do_signal */
+#define TIF_FREEZE 14 /* Freezing for suspend */
+#define TIF_RUNLATCH 15 /* Is the runlatch enabled? */
+#define TIF_ABI_PENDING 16 /* 32/64 bit switch needed */
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
@@ -146,7 +144,7 @@ static inline struct thread_info *curren
#define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING)
#define _TIF_SYSCALL_T_OR_A (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP)
-#define _TIF_USER_WORK_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \
+#define _TIF_USER_WORK_MASK ( _TIF_SIGPENDING | \
_TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
#define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR)
diff -puN include/asm-sh/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-sh/thread_info.h
--- a/include/asm-sh/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-sh/thread_info.h
@@ -107,18 +107,16 @@ static inline struct thread_info *curren
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */
-#define TIF_SINGLESTEP 5 /* singlestepping active */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_RESTORE_SIGMASK 3 /* restore signal mask in do_signal() */
+#define TIF_SINGLESTEP 4 /* singlestepping active */
#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE 18
#define TIF_FREEZE 19
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
diff -puN include/asm-v850/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-v850/thread_info.h
--- a/include/asm-v850/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-v850/thread_info.h
@@ -77,16 +77,14 @@ struct thread_info {
* thread information flag bit numbers
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_MEMDIE 5
+#define TIF_MEMDIE 4
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
diff -puN include/asm-x86_64/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-x86_64/thread_info.h
--- a/include/asm-x86_64/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-x86_64/thread_info.h
@@ -107,7 +107,6 @@ static inline struct thread_info *stack_
* Warning: layout of LSW is hardcoded in entry.S
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_SINGLESTEP 4 /* reenable singlestep on user return*/
@@ -126,7 +125,6 @@ static inline struct thread_info *stack_
#define TIF_FREEZE 23 /* is freezing for suspend */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
diff -puN include/asm-xtensa/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-xtensa/thread_info.h
--- a/include/asm-xtensa/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-xtensa/thread_info.h
@@ -110,17 +110,15 @@ static inline struct thread_info *curren
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
-#define TIF_IRET 5 /* return with iret */
-#define TIF_MEMDIE 6
-#define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal() */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */
+#define TIF_IRET 4 /* return with iret */
+#define TIF_MEMDIE 5
+#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
_
WARNING: multiple messages have this Message-ID (diff)
From: Andrew Morton <akpm@linux-foundation.org>
To: eranian@hpl.hp.com
Cc: linux-kernel@vger.kernel.org, ak@suse.de,
linux-ia64@vger.kernel.org, tony.luck@intel.com
Subject: Re: [PATCH] remove unused TIF_NOTIFY_RESUME (take 2)
Date: Mon, 30 Jul 2007 10:21:15 -0700 [thread overview]
Message-ID: <20070730102115.cac237ea.akpm@linux-foundation.org> (raw)
In-Reply-To: <20070730093034.GD25162@frankl.hpl.hp.com>
On Mon, 30 Jul 2007 02:30:34 -0700 Stephane Eranian <eranian@hpl.hp.com> wrote:
> This following patch removes the TIF_NOTIFY_RESUME flag for thread_info. It is unused
> on all but the IA-64 architecture. This is take 2 of this patch. In this version,
> The definition is removed but no re-numbering of the TIF flags is done to minimize
> the possibility of errors and reduce the size of the patch.
>
> For IA-64, we ran out of low-order bits (first 7 bits). Adding a bit for perfmon
> would cause important code rescheduling changes in the kernel entry/exit path. Instead,
> we replace TIF_NOTIFY_RESUME with TIF_PERFMON_WORK. This way we get very close to what the
> new perfmon code base is doing.
This has been (painfully) maintained in -mm for quite a long time. I've
been waiting for everyone else to merge their stuff so I can get it in
without disrupting them. This has now happened.
I think it'd be better to merge the larger patch - it's a bit tidier and
more tested, OK?
From: Stephane Eranian <eranian@hpl.hp.com>
Remove unused TIF_NOTIFY_RESUME flag for all processor architectures. The
flag was not used excecpt on IA-64 where the patch replaces it with
TIF_PERFMON_WORK.
Signed-off-by: stephane eranian <eranian@hpl.hp.com>
Cc: <linux-arch@vger.kernel.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/arm/kernel/entry-common.S | 2 -
arch/arm26/kernel/entry.S | 2 -
arch/ia64/kernel/perfmon.c | 4 +-
arch/powerpc/kernel/entry_64.S | 1
arch/x86_64/kernel/entry.S | 6 ++--
include/asm-alpha/thread_info.h | 24 +++++++----------
include/asm-arm/thread_info.h | 7 +----
include/asm-arm26/thread_info.h | 7 +----
include/asm-avr32/thread_info.h | 18 +++++--------
include/asm-blackfin/thread_info.h | 14 ++++------
include/asm-cris/thread_info.h | 6 +---
include/asm-frv/thread_info.h | 12 +++-----
include/asm-h8300/thread_info.h | 12 +++-----
include/asm-i386/thread_info.h | 18 +++++--------
include/asm-ia64/thread_info.h | 20 +++++++-------
include/asm-m32r/thread_info.h | 10 ++-----
include/asm-m68knommu/thread_info.h | 10 ++-----
include/asm-mips/thread_info.h | 10 ++-----
include/asm-parisc/thread_info.h | 16 +++++------
include/asm-powerpc/thread_info.h | 36 ++++++++++++--------------
include/asm-sh/thread_info.h | 10 ++-----
include/asm-v850/thread_info.h | 10 ++-----
include/asm-x86_64/thread_info.h | 2 -
include/asm-xtensa/thread_info.h | 14 ++++------
24 files changed, 116 insertions(+), 155 deletions(-)
diff -puN arch/arm26/kernel/entry.S~remove-unused-tif_notify_resume-flag arch/arm26/kernel/entry.S
--- a/arch/arm26/kernel/entry.S~remove-unused-tif_notify_resume-flag
+++ a/arch/arm26/kernel/entry.S
@@ -194,7 +194,7 @@ fast_work_pending:
work_pending:
tst r1, #_TIF_NEED_RESCHED
bne work_resched
- tst r1, #_TIF_NOTIFY_RESUME | _TIF_SIGPENDING
+ tst r1, #_TIF_SIGPENDING
beq no_work_pending
mov r0, sp @ 'regs'
mov r2, why @ 'syscall'
diff -puN arch/arm/kernel/entry-common.S~remove-unused-tif_notify_resume-flag arch/arm/kernel/entry-common.S
--- a/arch/arm/kernel/entry-common.S~remove-unused-tif_notify_resume-flag
+++ a/arch/arm/kernel/entry-common.S
@@ -46,7 +46,7 @@ fast_work_pending:
work_pending:
tst r1, #_TIF_NEED_RESCHED
bne work_resched
- tst r1, #_TIF_NOTIFY_RESUME | _TIF_SIGPENDING
+ tst r1, #_TIF_SIGPENDING
beq no_work_pending
mov r0, sp @ 'regs'
mov r2, why @ 'syscall'
diff -puN arch/ia64/kernel/perfmon.c~remove-unused-tif_notify_resume-flag arch/ia64/kernel/perfmon.c
--- a/arch/ia64/kernel/perfmon.c~remove-unused-tif_notify_resume-flag
+++ a/arch/ia64/kernel/perfmon.c
@@ -591,13 +591,13 @@ pfm_set_task_notify(struct task_struct *
struct thread_info *info;
info = (struct thread_info *) ((char *) task + IA64_TASK_SIZE);
- set_bit(TIF_NOTIFY_RESUME, &info->flags);
+ set_bit(TIF_PERFMON_WORK, &info->flags);
}
static inline void
pfm_clear_task_notify(void)
{
- clear_thread_flag(TIF_NOTIFY_RESUME);
+ clear_thread_flag(TIF_PERFMON_WORK);
}
static inline void
diff -puN arch/powerpc/kernel/entry_64.S~remove-unused-tif_notify_resume-flag arch/powerpc/kernel/entry_64.S
--- a/arch/powerpc/kernel/entry_64.S~remove-unused-tif_notify_resume-flag
+++ a/arch/powerpc/kernel/entry_64.S
@@ -546,7 +546,6 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISER
rfid
b . /* prevent speculative execution */
-/* Note: this must change if we start using the TIF_NOTIFY_RESUME bit */
do_work:
#ifdef CONFIG_PREEMPT
andi. r0,r3,MSR_PR /* Returning to user mode? */
diff -puN arch/x86_64/kernel/entry.S~remove-unused-tif_notify_resume-flag arch/x86_64/kernel/entry.S
--- a/arch/x86_64/kernel/entry.S~remove-unused-tif_notify_resume-flag
+++ a/arch/x86_64/kernel/entry.S
@@ -282,7 +282,7 @@ sysret_careful:
sysret_signal:
TRACE_IRQS_ON
sti
- testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
+ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
jz 1f
/* Really a signal */
@@ -375,7 +375,7 @@ int_very_careful:
jmp int_restore_rest
int_signal:
- testl $(_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
+ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
jz 1f
movq %rsp,%rdi # &ptregs -> arg1
xorl %esi,%esi # oldset -> arg2
@@ -599,7 +599,7 @@ retint_careful:
jmp retint_check
retint_signal:
- testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
+ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
jz retint_swapgs
TRACE_IRQS_ON
sti
diff -puN include/asm-alpha/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-alpha/thread_info.h
--- a/include/asm-alpha/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-alpha/thread_info.h
@@ -67,28 +67,24 @@ register struct thread_info *__current_t
* TIF_SYSCALL_TRACE is known to be 0 via blbs.
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* poll_idle is polling NEED_RESCHED */
-#define TIF_DIE_IF_KERNEL 5 /* dik recursion lock */
-#define TIF_UAC_NOPRINT 6 /* see sysinfo.h */
-#define TIF_UAC_NOFIX 7
-#define TIF_UAC_SIGBUS 8
-#define TIF_MEMDIE 9
-#define TIF_RESTORE_SIGMASK 10 /* restore signal mask in do_signal */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* poll_idle is polling NEED_RESCHED */
+#define TIF_DIE_IF_KERNEL 4 /* dik recursion lock */
+#define TIF_UAC_NOPRINT 5 /* see sysinfo.h */
+#define TIF_UAC_NOFIX 6
+#define TIF_UAC_SIGBUS 7
+#define TIF_MEMDIE 8
+#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
/* Work to do on interrupt/exception return. */
-#define _TIF_WORK_MASK (_TIF_NOTIFY_RESUME \
- | _TIF_SIGPENDING \
- | _TIF_NEED_RESCHED)
+#define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED)
/* Work to do on any return to userspace. */
#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK \
diff -puN include/asm-arm26/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-arm26/thread_info.h
--- a/include/asm-arm26/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-arm26/thread_info.h
@@ -110,21 +110,18 @@ extern void free_thread_info(struct thre
/*
* thread information flags:
* TIF_SYSCALL_TRACE - syscall trace active
- * TIF_NOTIFY_RESUME - resumption notification requested
* TIF_SIGPENDING - signal pending
* TIF_NEED_RESCHED - rescheduling necessary
* TIF_USEDFPU - FPU was used by this task this quantum (SMP)
* TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED
*/
-#define TIF_NOTIFY_RESUME 0
-#define TIF_SIGPENDING 1
-#define TIF_NEED_RESCHED 2
+#define TIF_SIGPENDING 0
+#define TIF_NEED_RESCHED 1
#define TIF_SYSCALL_TRACE 8
#define TIF_USED_FPU 16
#define TIF_POLLING_NRFLAG 17
#define TIF_MEMDIE 18
-#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
diff -puN include/asm-arm/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-arm/thread_info.h
--- a/include/asm-arm/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-arm/thread_info.h
@@ -134,22 +134,19 @@ extern void iwmmxt_task_switch(struct th
/*
* thread information flags:
* TIF_SYSCALL_TRACE - syscall trace active
- * TIF_NOTIFY_RESUME - resumption notification requested
* TIF_SIGPENDING - signal pending
* TIF_NEED_RESCHED - rescheduling necessary
* TIF_USEDFPU - FPU was used by this task this quantum (SMP)
* TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED
*/
-#define TIF_NOTIFY_RESUME 0
-#define TIF_SIGPENDING 1
-#define TIF_NEED_RESCHED 2
+#define TIF_SIGPENDING 0
+#define TIF_NEED_RESCHED 1
#define TIF_SYSCALL_TRACE 8
#define TIF_POLLING_NRFLAG 16
#define TIF_USING_IWMMXT 17
#define TIF_MEMDIE 18
#define TIF_FREEZE 19
-#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
diff -puN include/asm-avr32/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-avr32/thread_info.h
--- a/include/asm-avr32/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-avr32/thread_info.h
@@ -74,20 +74,18 @@ static inline struct thread_info *curren
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_BREAKPOINT 5 /* true if we should break after return */
-#define TIF_SINGLE_STEP 6 /* single step after next break */
-#define TIF_MEMDIE 7
-#define TIF_RESTORE_SIGMASK 8 /* restore signal mask in do_signal */
-#define TIF_CPU_GOING_TO_SLEEP 9 /* CPU is entering sleep 0 mode */
+#define TIF_BREAKPOINT 4 /* true if we should break after return */
+#define TIF_SINGLE_STEP 5 /* single step after next break */
+#define TIF_MEMDIE 6
+#define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal */
+#define TIF_CPU_GOING_TO_SLEEP 8 /* CPU is entering sleep 0 mode */
#define TIF_USERSPACE 31 /* true if FS sets userspace */
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
diff -puN include/asm-blackfin/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-blackfin/thread_info.h
--- a/include/asm-blackfin/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-blackfin/thread_info.h
@@ -118,18 +118,16 @@ static inline struct thread_info *curren
* thread information flag bit numbers
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_MEMDIE 5
-#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
-#define TIF_FREEZE 7 /* is freezing for suspend */
+#define TIF_MEMDIE 4
+#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
+#define TIF_FREEZE 6 /* is freezing for suspend */
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
diff -puN include/asm-cris/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-cris/thread_info.h
--- a/include/asm-cris/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-cris/thread_info.h
@@ -79,14 +79,12 @@ struct thread_info {
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE 17
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
diff -puN include/asm-frv/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-frv/thread_info.h
--- a/include/asm-frv/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-frv/thread_info.h
@@ -108,18 +108,16 @@ register struct thread_info *__current_t
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
-#define TIF_IRET 5 /* return with iret */
-#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */
+#define TIF_IRET 4 /* return with iret */
+#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE 17 /* OOM killer killed process */
#define TIF_FREEZE 18 /* freezing for suspend */
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
diff -puN include/asm-h8300/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-h8300/thread_info.h
--- a/include/asm-h8300/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-h8300/thread_info.h
@@ -86,17 +86,15 @@ static inline struct thread_info *curren
* thread information flag bit numbers
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_MEMDIE 5
-#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
+#define TIF_MEMDIE 4
+#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
diff -puN include/asm-i386/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-i386/thread_info.h
--- a/include/asm-i386/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-i386/thread_info.h
@@ -124,15 +124,14 @@ static inline struct thread_info *curren
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
-#define TIF_IRET 5 /* return with iret */
-#define TIF_SYSCALL_EMU 6 /* syscall emulation active */
-#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_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */
+#define TIF_IRET 4 /* return with iret */
+#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_MEMDIE 16
#define TIF_DEBUG 17 /* uses debug registers */
#define TIF_IO_BITMAP 18 /* uses I/O bitmap */
@@ -140,7 +139,6 @@ static inline struct thread_info *curren
#define TIF_NOTSC 20 /* TSC is not accessible in userland */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
diff -puN include/asm-ia64/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-ia64/thread_info.h
--- a/include/asm-ia64/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-ia64/thread_info.h
@@ -79,13 +79,13 @@ struct thread_info {
* - pending work-to-be-done flags are in least-significant 16 bits, other flags
* in top 16 bits
*/
-#define TIF_NOTIFY_RESUME 0 /* resumption notification requested */
-#define TIF_SIGPENDING 1 /* signal pending */
-#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
-#define TIF_SYSCALL_TRACE 3 /* syscall trace active */
-#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
-#define TIF_SINGLESTEP 5 /* restore singlestep on return to user mode */
-#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
+#define TIF_SIGPENDING 0 /* signal pending */
+#define TIF_NEED_RESCHED 1 /* rescheduling necessary */
+#define TIF_SYSCALL_TRACE 2 /* syscall trace active */
+#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
+#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
+#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
+#define TIF_PERFMON_WORK 6 /* work for pfm_handle_work() */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE 17
#define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
@@ -96,8 +96,8 @@ struct thread_info {
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP)
-#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
+#define _TIF_PERFMON_WORK (1 << TIF_PERFMON_WORK)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
@@ -106,7 +106,9 @@ struct thread_info {
#define _TIF_FREEZE (1 << TIF_FREEZE)
/* "work to do on user-return" bits */
-#define TIF_ALLWORK_MASK (_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_RESTORE_SIGMASK)
+#define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_PERFMON_WORK|_TIF_SYSCALL_AUDIT|\
+ _TIF_NEED_RESCHED| _TIF_SYSCALL_TRACE|\
+ _TIF_RESTORE_SIGMASK)
/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
#define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))
diff -puN include/asm-m32r/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-m32r/thread_info.h
--- a/include/asm-m32r/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-m32r/thread_info.h
@@ -146,17 +146,15 @@ static inline unsigned int get_thread_fa
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
-#define TIF_IRET 5 /* return with iret */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */
+#define TIF_IRET 4 /* return with iret */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
/* 31..28 fault code */
#define TIF_MEMDIE 17
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
diff -puN include/asm-m68knommu/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-m68knommu/thread_info.h
--- a/include/asm-m68knommu/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-m68knommu/thread_info.h
@@ -83,16 +83,14 @@ static inline struct thread_info *curren
* thread information flag bit numbers
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_MEMDIE 5
+#define TIF_MEMDIE 4
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
diff -puN include/asm-mips/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-mips/thread_info.h
--- a/include/asm-mips/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-mips/thread_info.h
@@ -109,11 +109,10 @@ register struct thread_info *__current_t
* - pending work-to-be-done flags are in LSW
* - other flags in MSW
*/
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
-#define TIF_SECCOMP 5 /* secure computing */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
+#define TIF_SECCOMP 4 /* secure computing */
#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */
@@ -122,7 +121,6 @@ register struct thread_info *__current_t
#define TIF_SYSCALL_TRACE 31 /* syscall trace active */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
diff -puN include/asm-parisc/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-parisc/thread_info.h
--- a/include/asm-parisc/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-parisc/thread_info.h
@@ -56,23 +56,21 @@ struct thread_info {
* thread information flags
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling TIF_NEED_RESCHED */
-#define TIF_32BIT 5 /* 32 bit binary */
-#define TIF_MEMDIE 6
-#define TIF_RESTORE_SIGMASK 7 /* restore saved signal mask */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling TIF_NEED_RESCHED */
+#define TIF_32BIT 4 /* 32 bit binary */
+#define TIF_MEMDIE 5
+#define TIF_RESTORE_SIGMASK 6 /* restore saved signal mask */
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_32BIT (1 << TIF_32BIT)
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
-#define _TIF_USER_WORK_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \
+#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | \
_TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
#endif /* __KERNEL__ */
diff -puN include/asm-powerpc/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-powerpc/thread_info.h
--- a/include/asm-powerpc/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-powerpc/thread_info.h
@@ -107,28 +107,26 @@ static inline struct thread_info *curren
* thread information flag bit numbers
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_32BIT 5 /* 32 bit binary */
-#define TIF_PERFMON_WORK 6 /* work for pfm_handle_work() */
-#define TIF_PERFMON_CTXSW 7 /* perfmon needs ctxsw calls */
-#define TIF_SYSCALL_AUDIT 8 /* syscall auditing active */
-#define TIF_SINGLESTEP 9 /* singlestepping active */
-#define TIF_MEMDIE 10
-#define TIF_SECCOMP 11 /* secure computing */
-#define TIF_RESTOREALL 12 /* Restore all regs (implies NOERROR) */
-#define TIF_NOERROR 14 /* Force successful syscall return */
-#define TIF_RESTORE_SIGMASK 15 /* Restore signal mask in do_signal */
-#define TIF_FREEZE 16 /* Freezing for suspend */
-#define TIF_RUNLATCH 17 /* Is the runlatch enabled? */
-#define TIF_ABI_PENDING 18 /* 32/64 bit switch needed */
+#define TIF_32BIT 4 /* 32 bit binary */
+#define TIF_PERFMON_WORK 5 /* work for pfm_handle_work() */
+#define TIF_PERFMON_CTXSW 6 /* perfmon needs ctxsw calls */
+#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
+#define TIF_SINGLESTEP 8 /* singlestepping active */
+#define TIF_MEMDIE 9
+#define TIF_SECCOMP 10 /* secure computing */
+#define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */
+#define TIF_NOERROR 12 /* Force successful syscall return */
+#define TIF_RESTORE_SIGMASK 13 /* Restore signal mask in do_signal */
+#define TIF_FREEZE 14 /* Freezing for suspend */
+#define TIF_RUNLATCH 15 /* Is the runlatch enabled? */
+#define TIF_ABI_PENDING 16 /* 32/64 bit switch needed */
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
@@ -146,7 +144,7 @@ static inline struct thread_info *curren
#define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING)
#define _TIF_SYSCALL_T_OR_A (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP)
-#define _TIF_USER_WORK_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \
+#define _TIF_USER_WORK_MASK ( _TIF_SIGPENDING | \
_TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
#define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR)
diff -puN include/asm-sh/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-sh/thread_info.h
--- a/include/asm-sh/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-sh/thread_info.h
@@ -107,18 +107,16 @@ static inline struct thread_info *curren
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */
-#define TIF_SINGLESTEP 5 /* singlestepping active */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_RESTORE_SIGMASK 3 /* restore signal mask in do_signal() */
+#define TIF_SINGLESTEP 4 /* singlestepping active */
#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE 18
#define TIF_FREEZE 19
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
diff -puN include/asm-v850/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-v850/thread_info.h
--- a/include/asm-v850/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-v850/thread_info.h
@@ -77,16 +77,14 @@ struct thread_info {
* thread information flag bit numbers
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_MEMDIE 5
+#define TIF_MEMDIE 4
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
diff -puN include/asm-x86_64/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-x86_64/thread_info.h
--- a/include/asm-x86_64/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-x86_64/thread_info.h
@@ -107,7 +107,6 @@ static inline struct thread_info *stack_
* Warning: layout of LSW is hardcoded in entry.S
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_SINGLESTEP 4 /* reenable singlestep on user return*/
@@ -126,7 +125,6 @@ static inline struct thread_info *stack_
#define TIF_FREEZE 23 /* is freezing for suspend */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
diff -puN include/asm-xtensa/thread_info.h~remove-unused-tif_notify_resume-flag include/asm-xtensa/thread_info.h
--- a/include/asm-xtensa/thread_info.h~remove-unused-tif_notify_resume-flag
+++ a/include/asm-xtensa/thread_info.h
@@ -110,17 +110,15 @@ static inline struct thread_info *curren
* - other flags in MSW
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
-#define TIF_IRET 5 /* return with iret */
-#define TIF_MEMDIE 6
-#define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal() */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */
+#define TIF_IRET 4 /* return with iret */
+#define TIF_MEMDIE 5
+#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
_
next prev parent reply other threads:[~2007-07-30 17:21 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-22 12:47 is TIF_NOTIFY_RESUME used? Stephane Eranian
2007-05-22 12:47 ` Stephane Eranian
2007-05-22 16:02 ` Andrew Morton
2007-05-22 16:02 ` Andrew Morton
2007-05-22 16:07 ` Stephane Eranian
2007-05-22 16:07 ` Stephane Eranian
2007-05-22 16:15 ` Andrew Morton
2007-05-22 16:15 ` Andrew Morton
2007-05-22 22:51 ` Stephane Eranian
2007-05-22 22:51 ` Stephane Eranian
2007-05-22 23:02 ` Andrew Morton
2007-05-22 23:02 ` Andrew Morton
2007-05-23 9:57 ` [PATCH] remove unused TIF_NOTIFY_RESUME flag Stephane Eranian
2007-05-23 9:57 ` Stephane Eranian
2007-07-30 9:30 ` [PATCH] remove unused TIF_NOTIFY_RESUME (take 2) Stephane Eranian
2007-07-30 9:30 ` Stephane Eranian
2007-07-30 17:21 ` Andrew Morton [this message]
2007-07-30 17:21 ` Andrew Morton
2007-07-30 17:42 ` Stephane Eranian
2007-07-30 17:42 ` Stephane Eranian
2007-05-22 18:20 ` [PATCH 1/2] Define new percpu interface for shared data -- version 3 Fenghua Yu
2007-05-23 17:49 ` Andrew Morton
2007-05-23 18:26 ` Yu, Fenghua
2007-05-23 18:57 ` Ravikiran G Thirumalai
2007-05-23 19:09 ` Yu, Fenghua
2007-05-23 19:20 ` Ravikiran G Thirumalai
2007-05-23 19:31 ` Andrew Morton
2007-05-23 21:13 ` Yu, Fenghua
2007-05-25 9:43 ` Russell King
2007-05-25 15:24 ` Yu, Fenghua
2007-05-24 9:03 ` Martin Schwidefsky
2007-05-24 10:16 ` Ravikiran G Thirumalai
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