diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-04-29 03:35:29 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-02-03 18:16:01 -0500 |
| commit | c886a9fc1f69c0e53788a9c4a780b6b8825bd4ab (patch) | |
| tree | dc732cc68efe2bea82d9470a577252685832c44a /arch/microblaze | |
| parent | 4a9d32d377e1facca204cc1c6856406be8b53fa3 (diff) | |
| download | linux-c886a9fc1f69c0e53788a9c4a780b6b8825bd4ab.tar.bz2 | |
microblaze: evict the check for kernel_mode(regs) from do_notify_resume()
Only one caller hasn't done it in assembler - work_pending on !MMU.
Everything else can't reach do_notify_resume() if we are returning
to kernel mode, so move that check to that sole caller and make
do_notify_resume() reachable only when returning to userland.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/microblaze')
| -rw-r--r-- | arch/microblaze/kernel/entry-nommu.S | 3 | ||||
| -rw-r--r-- | arch/microblaze/kernel/signal.c | 9 |
2 files changed, 3 insertions, 9 deletions
diff --git a/arch/microblaze/kernel/entry-nommu.S b/arch/microblaze/kernel/entry-nommu.S index 70da83a49670..29a05d62ec1a 100644 --- a/arch/microblaze/kernel/entry-nommu.S +++ b/arch/microblaze/kernel/entry-nommu.S @@ -482,6 +482,8 @@ ENTRY(ret_from_kernel_thread) addk r3, r0, r0 work_pending: + lwi r11, r1, PT_MODE + bneid r11, 2f enable_irq andi r11, r19, _TIF_NEED_RESCHED @@ -507,6 +509,7 @@ ENTRY(ret_to_user) no_work_pending: disable_irq +2: /* save r31 */ swi r31, r0, PER_CPU(CURRENT_SAVE) /* save mode indicator */ diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c index dfd61e2f1189..9f7a8bde0686 100644 --- a/arch/microblaze/kernel/signal.c +++ b/arch/microblaze/kernel/signal.c @@ -343,15 +343,6 @@ static void do_signal(struct pt_regs *regs, int in_syscall) asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall) { - /* - * We want the common case to go fast, which - * is why we may in certain cases get here from - * kernel mode. Just return without doing anything - * if so. - */ - if (kernel_mode(regs)) - return; - if (test_thread_flag(TIF_SIGPENDING)) do_signal(regs, in_syscall); |