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Code

ARM: 7472/1: pull all work_pending logics into C function

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Al Viro 2012-07-19 17:47:55 +01:00 committed by Russell King
parent 8d4150ccbb
commit 0a267fa6a1
2 changed files with 21 additions and 23 deletions
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17
arch/arm/kernel/entry-common.S
View File

@ -51,23 +51,10 @@ ret_fast_syscall:
fast_work_pending:
str r0, [sp, #S_R0+S_OFF]! @ returned r0
work_pending:
tst r1, #_TIF_NEED_RESCHED
bne work_resched
/*
* TIF_SIGPENDING or TIF_NOTIFY_RESUME must've been set if we got here
*/
ldr r2, [sp, #S_PSR]
mov r0, sp @ 'regs'
tst r2, #15 @ are we returning to user mode?
bne no_work_pending @ no? just leave, then...
mov r2, why @ 'syscall'
tst r1, #_TIF_SIGPENDING @ delivering a signal?
movne why, #0 @ prevent further restarts
bl do_notify_resume
b ret_slow_syscall @ Check work again
work_resched:
bl schedule
bl do_work_pending
b no_work_pending
/*
* "slow" syscall return path. "why" tells us if this was a real syscall.
*/

19
arch/arm/kernel/signal.c
View File

@ -640,13 +640,24 @@ static void do_signal(struct pt_regs *regs, int syscall)
}
asmlinkage void
do_notify_resume(struct pt_regs *regs, unsigned int thread_flags, int syscall)
do_work_pending(struct pt_regs *regs, unsigned int thread_flags, int syscall)
{
if (thread_flags & _TIF_SIGPENDING)
do {
if (likely(thread_flags & _TIF_NEED_RESCHED)) {
schedule();
} else {
if (unlikely(!user_mode(regs)))
return;
local_irq_enable();
if (thread_flags & _TIF_SIGPENDING) {
do_signal(regs, syscall);
if (thread_flags & _TIF_NOTIFY_RESUME) {
syscall = 0;
} else {
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
}
}
local_irq_disable();
thread_flags = current_thread_info()->flags;
} while (thread_flags & _TIF_WORK_MASK);
}