remove unused TIF_NOTIFY_RESUME flag

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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

5 files changed, 7 insertions, 8 deletions

diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index c589dc3ecd1a..33e6cc2ffd3b 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/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 --git a/arch/arm26/kernel/entry.S b/arch/arm26/kernel/entry.S
index 91496cc687b1..7ffcc6e4770e 100644
--- a/arch/arm26/kernel/entry.S
+++ b/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 --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index b7133cabdbea..14b8e5a6222b 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -591,13 +591,13 @@ pfm_set_task_notify(struct task_struct *task)
         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 --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 2b66d53dcc55..9ef28da2c7fe 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -546,7 +546,6 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
         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 --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S
index 830cfc6ee8cb..1d232e5f5658 100644
--- a/arch/x86_64/kernel/entry.S
+++ b/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