[PATCH] remove unused TIF_NOTIFY_RESUME flag

Stephane Eranian
2007-05-23T09:57:43Z

Hello,

As per the recent discussion, the folowing patch removes the TIF_NOTIFY_RESUME
flag from all processor architectures. The flag was not used except on IA-64
for the perfmon subsystem. For IA-64, the patch replaces the flag with a new
dedicated TIF flag. This provides an extra low-order bit for the TIF flags.
I tested the kernel compiles on i386,x86_64,mips,ia64,powerpc.

The patch is relative to 2.6.22-rc2 but applies smoothly to 2.6.22-rc2-git3.

Changelog:
- 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>

diff -urNp linux-2.6.22.orig/arch/arm/kernel/entry-common.S linux-2.6.22.base/arch/arm/kernel/entry-common.S
--- linux-2.6.22.orig/arch/arm/kernel/entry-common.S 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/arch/arm/kernel/entry-common.S 2007-05-22 13:38:39.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/arch/arm26/kernel/entry.S linux-2.6.22.base/arch/arm26/kernel/entry.S
--- linux-2.6.22.orig/arch/arm26/kernel/entry.S 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/arch/arm26/kernel/entry.S 2007-05-22 13:39:00.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/arch/ia64/kernel/perfmon.c linux-2.6.22.base/arch/ia64/kernel/perfmon.c
--- linux-2.6.22.orig/arch/ia64/kernel/perfmon.c 2007-05-21 01:39:04.000000000 -0700
+++ linux-2.6.22.base/arch/ia64/kernel/perfmon.c 2007-05-22 13:41:23.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/arch/powerpc/kernel/entry_64.S linux-2.6.22.base/arch/powerpc/kernel/entry_64.S
--- linux-2.6.22.orig/arch/powerpc/kernel/entry_64.S 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/arch/powerpc/kernel/entry_64.S 2007-05-22 13:39:55.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/arch/x86_64/kernel/entry.S linux-2.6.22.base/arch/x86_64/kernel/entry.S
--- linux-2.6.22.orig/arch/x86_64/kernel/entry.S 2007-05-21 01:39:05.000000000 -0700
+++ linux-2.6.22.base/arch/x86_64/kernel/entry.S 2007-05-22 13:40:14.000000000 -0700
@@ -282,7 +282,7 @@ sysret_careful:
sysret_signal:
TRACE_IRQS_ON
sti
- testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP),%edx
+ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP),%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),%edx
+ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP),%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),%edx
+ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP),%edx
jz retint_swapgs
TRACE_IRQS_ON
sti
diff -urNp linux-2.6.22.orig/include/asm-alpha/thread_info.h linux-2.6.22.base/include/asm-alpha/thread_info.h
--- linux-2.6.22.orig/include/asm-alpha/thread_info.h 2007-05-21 01:39:09.000000000 -0700
+++ linux-2.6.22.base/include/asm-alpha/thread_info.h 2007-05-22 13:26:24.000000000 -0700
@@ -67,25 +67,22 @@ 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_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_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)

/* Work to do on interrupt/exception return. */
-#define _TIF_WORK_MASK (_TIF_NOTIFY_RESUME \
- | _TIF_SIGPENDING \
+#define _TIF_WORK_MASK (_TIF_SIGPENDING \
| _TIF_NEED_RESCHED)

/* Work to do on any return to userspace. */
diff -urNp linux-2.6.22.orig/include/asm-arm/thread_info.h linux-2.6.22.base/include/asm-arm/thread_info.h
--- linux-2.6.22.orig/include/asm-arm/thread_info.h 2007-05-21 01:39:10.000000000 -0700
+++ linux-2.6.22.base/include/asm-arm/thread_info.h 2007-05-22 13:26:48.000000000 -0700
@@ -135,22 +135,19 @@ 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 -urNp linux-2.6.22.orig/include/asm-arm26/thread_info.h linux-2.6.22.base/include/asm-arm26/thread_info.h
--- linux-2.6.22.orig/include/asm-arm26/thread_info.h 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/include/asm-arm26/thread_info.h 2007-05-22 13:27:13.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/include/asm-avr32/thread_info.h linux-2.6.22.base/include/asm-avr32/thread_info.h
--- linux-2.6.22.orig/include/asm-avr32/thread_info.h 2007-05-21 01:39:10.000000000 -0700
+++ linux-2.6.22.base/include/asm-avr32/thread_info.h 2007-05-22 13:27:49.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/include/asm-blackfin/thread_info.h linux-2.6.22.base/include/asm-blackfin/thread_info.h
--- linux-2.6.22.orig/include/asm-blackfin/thread_info.h 2007-05-21 01:39:10.000000000 -0700
+++ linux-2.6.22.base/include/asm-blackfin/thread_info.h 2007-05-22 13:28:25.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/include/asm-cris/thread_info.h linux-2.6.22.base/include/asm-cris/thread_info.h
--- linux-2.6.22.orig/include/asm-cris/thread_info.h 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/include/asm-cris/thread_info.h 2007-05-22 13:31:49.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/include/asm-frv/thread_info.h linux-2.6.22.base/include/asm-frv/thread_info.h
--- linux-2.6.22.orig/include/asm-frv/thread_info.h 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/include/asm-frv/thread_info.h 2007-05-22 13:33:27.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/include/asm-h8300/thread_info.h linux-2.6.22.base/include/asm-h8300/thread_info.h
--- linux-2.6.22.orig/include/asm-h8300/thread_info.h 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/include/asm-h8300/thread_info.h 2007-05-22 13:28:48.000000000 -0700
@@ -86,16 +86,14 @@ 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 -urNp linux-2.6.22.orig/include/asm-i386/thread_info.h linux-2.6.22.base/include/asm-i386/thread_info.h
--- linux-2.6.22.orig/include/asm-i386/thread_info.h 2007-05-21 01:39:10.000000000 -0700
+++ linux-2.6.22.base/include/asm-i386/thread_info.h 2007-05-22 13:23:35.000000000 -0700
@@ -124,22 +124,20 @@ 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 */
#define TIF_FREEZE 19 /* 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_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
diff -urNp linux-2.6.22.orig/include/asm-ia64/thread_info.h linux-2.6.22.base/include/asm-ia64/thread_info.h
--- linux-2.6.22.orig/include/asm-ia64/thread_info.h 2007-05-21 01:39:10.000000000 -0700
+++ linux-2.6.22.base/include/asm-ia64/thread_info.h 2007-05-23 02:00:11.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/include/asm-m32r/thread_info.h linux-2.6.22.base/include/asm-m32r/thread_info.h
--- linux-2.6.22.orig/include/asm-m32r/thread_info.h 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/include/asm-m32r/thread_info.h 2007-05-22 13:35:09.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/include/asm-m68knommu/thread_info.h linux-2.6.22.base/include/asm-m68knommu/thread_info.h
--- linux-2.6.22.orig/include/asm-m68knommu/thread_info.h 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/include/asm-m68knommu/thread_info.h 2007-05-22 13:32:30.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/include/asm-mips/thread_info.h linux-2.6.22.base/include/asm-mips/thread_info.h
--- linux-2.6.22.orig/include/asm-mips/thread_info.h 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/include/asm-mips/thread_info.h 2007-05-22 13:38:13.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/include/asm-parisc/thread_info.h linux-2.6.22.base/include/asm-parisc/thread_info.h
--- linux-2.6.22.orig/include/asm-parisc/thread_info.h 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/include/asm-parisc/thread_info.h 2007-05-22 13:35:52.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/include/asm-powerpc/thread_info.h linux-2.6.22.base/include/asm-powerpc/thread_info.h
--- linux-2.6.22.orig/include/asm-powerpc/thread_info.h 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/include/asm-powerpc/thread_info.h 2007-05-22 13:25:36.000000000 -0700
@@ -107,26 +107,24 @@ 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_RUNLATCH 6 /* Is the runlatch enabled? */
-#define TIF_ABI_PENDING 7 /* 32/64 bit switch needed */
-#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_32BIT 4 /* 32 bit binary */
+#define TIF_RUNLATCH 5 /* Is the runlatch enabled? */
+#define TIF_ABI_PENDING 6 /* 32/64 bit switch needed */
+#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 14 /* Force successful syscall return */
#define TIF_RESTORE_SIGMASK 15 /* Restore signal mask in do_signal */
#define TIF_FREEZE 16 /* 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)
@@ -142,7 +140,7 @@ static inline struct thread_info *curren
#define _TIF_FREEZE (1<<TIF_FREEZE)
#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 -urNp linux-2.6.22.orig/include/asm-sh/thread_info.h linux-2.6.22.base/include/asm-sh/thread_info.h
--- linux-2.6.22.orig/include/asm-sh/thread_info.h 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/include/asm-sh/thread_info.h 2007-05-22 13:36:11.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/include/asm-v850/thread_info.h linux-2.6.22.base/include/asm-v850/thread_info.h
--- linux-2.6.22.orig/include/asm-v850/thread_info.h 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/include/asm-v850/thread_info.h 2007-05-22 13:30:32.000000000 -0700
@@ -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 -urNp linux-2.6.22.orig/include/asm-x86_64/thread_info.h linux-2.6.22.base/include/asm-x86_64/thread_info.h
--- linux-2.6.22.orig/include/asm-x86_64/thread_info.h 2007-05-21 01:39:10.000000000 -0700
+++ linux-2.6.22.base/include/asm-x86_64/thread_info.h 2007-05-22 13:23:58.000000000 -0700
@@ -107,14 +107,13 @@ 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*/
-#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_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_SINGLESTEP 3 /* reenable singlestep on user return*/
+#define TIF_IRET 4 /* force IRET */
+#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */
+#define TIF_SECCOMP 6 /* secure computing */
+#define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal */
/* 16 free */
#define TIF_IA32 17 /* 32bit process */
#define TIF_FORK 18 /* ret_from_fork */
@@ -125,7 +124,6 @@ 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 -urNp linux-2.6.22.orig/include/asm-xtensa/thread_info.h linux-2.6.22.base/include/asm-xtensa/thread_info.h
--- linux-2.6.22.orig/include/asm-xtensa/thread_info.h 2007-04-25 20:08:32.000000000 -0700
+++ linux-2.6.22.base/include/asm-xtensa/thread_info.h 2007-05-22 13:34:20.000000000 -0700
@@ -110,16 +110,14 @@ 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_MEMDIE 6
+#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_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)