diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2008-05-17 16:01:05 +0200 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-17 16:01:05 +0200 |
commit | 0e50a4c6ab94ffe7e5515b86b5df9e5abc8c6b13 (patch) | |
tree | 3c688483e71261f564fc43be3157b337ae340dca /arch/ia64/kernel/process.c | |
parent | 34b2cd5b688b012975fcfc3b3970fc3508fa82c4 (diff) | |
parent | f26a3988917913b3d11b2bd741601a2c64ab9204 (diff) |
Merge branch 'linus' into x86/pebstip-x86-pebs-2008-05-17-14-01-06
Diffstat (limited to 'arch/ia64/kernel/process.c')
-rw-r--r-- | arch/ia64/kernel/process.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c index 58dcfac5ea88..a3a34b4eb038 100644 --- a/arch/ia64/kernel/process.c +++ b/arch/ia64/kernel/process.c @@ -167,11 +167,18 @@ void tsk_clear_notify_resume(struct task_struct *tsk) clear_ti_thread_flag(task_thread_info(tsk), TIF_NOTIFY_RESUME); } +/* + * do_notify_resume_user(): + * Called from notify_resume_user at entry.S, with interrupts disabled. + */ void -do_notify_resume_user (sigset_t *unused, struct sigscratch *scr, long in_syscall) +do_notify_resume_user(sigset_t *unused, struct sigscratch *scr, long in_syscall) { if (fsys_mode(current, &scr->pt)) { - /* defer signal-handling etc. until we return to privilege-level 0. */ + /* + * defer signal-handling etc. until we return to + * privilege-level 0. + */ if (!ia64_psr(&scr->pt)->lp) ia64_psr(&scr->pt)->lp = 1; return; @@ -179,16 +186,26 @@ do_notify_resume_user (sigset_t *unused, struct sigscratch *scr, long in_syscall #ifdef CONFIG_PERFMON if (current->thread.pfm_needs_checking) + /* + * Note: pfm_handle_work() allow us to call it with interrupts + * disabled, and may enable interrupts within the function. + */ pfm_handle_work(); #endif /* deal with pending signal delivery */ - if (test_thread_flag(TIF_SIGPENDING)) + if (test_thread_flag(TIF_SIGPENDING)) { + local_irq_enable(); /* force interrupt enable */ ia64_do_signal(scr, in_syscall); + } /* copy user rbs to kernel rbs */ - if (unlikely(test_thread_flag(TIF_RESTORE_RSE))) + if (unlikely(test_thread_flag(TIF_RESTORE_RSE))) { + local_irq_enable(); /* force interrupt enable */ ia64_sync_krbs(); + } + + local_irq_disable(); /* force interrupt disable */ } static int pal_halt = 1; |