diff options
Diffstat (limited to 'features/rt/preempt-Provide-preempt_-_-no-rt-variants.patch')
| -rw-r--r-- | features/rt/preempt-Provide-preempt_-_-no-rt-variants.patch | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/features/rt/preempt-Provide-preempt_-_-no-rt-variants.patch b/features/rt/preempt-Provide-preempt_-_-no-rt-variants.patch new file mode 100644 index 00000000..c186b8ae --- /dev/null +++ b/features/rt/preempt-Provide-preempt_-_-no-rt-variants.patch @@ -0,0 +1,52 @@ +From 6151dd51e19fcd371b8b3690f38f5065c8ce383b Mon Sep 17 00:00:00 2001 +From: Thomas Gleixner <tglx@linutronix.de> +Date: Fri, 24 Jul 2009 12:38:56 +0200 +Subject: [PATCH 084/191] preempt: Provide preempt_*_(no)rt variants + +RT needs a few preempt_disable/enable points which are not necessary +otherwise. Implement variants to avoid #ifdeffery. + +Signed-off-by: Thomas Gleixner <tglx@linutronix.de> +--- + include/linux/preempt.h | 18 +++++++++++++++++- + 1 file changed, 17 insertions(+), 1 deletion(-) + +diff --git a/include/linux/preempt.h b/include/linux/preempt.h +index 4d244e295e85..5ceac863e729 100644 +--- a/include/linux/preempt.h ++++ b/include/linux/preempt.h +@@ -188,7 +188,11 @@ do { \ + preempt_count_dec(); \ + } while (0) + +-#define preempt_enable_no_resched() sched_preempt_enable_no_resched() ++#ifdef CONFIG_PREEMPT_RT ++# define preempt_enable_no_resched() sched_preempt_enable_no_resched() ++#else ++# define preempt_enable_no_resched() preempt_enable() ++#endif + + #define preemptible() (preempt_count() == 0 && !irqs_disabled()) + +@@ -282,6 +286,18 @@ do { \ + set_preempt_need_resched(); \ + } while (0) + ++#ifdef CONFIG_PREEMPT_RT ++# define preempt_disable_rt() preempt_disable() ++# define preempt_enable_rt() preempt_enable() ++# define preempt_disable_nort() barrier() ++# define preempt_enable_nort() barrier() ++#else ++# define preempt_disable_rt() barrier() ++# define preempt_enable_rt() barrier() ++# define preempt_disable_nort() preempt_disable() ++# define preempt_enable_nort() preempt_enable() ++#endif ++ + #ifdef CONFIG_PREEMPT_NOTIFIERS + + struct preempt_notifier; +-- +2.19.1 + |