From 5d03bd0fdd66d3472386864cf32b4b82dda8d1a5 Mon Sep 17 00:00:00 2001 From: Riley Andrews Date: Fri, 26 Sep 2014 17:36:36 -0700 Subject: [PATCH] staging: binder: Change binder mutex to rtmutex. Surfaceflinger uses binder heavily to receive/send frames from applications while compositing the screen. Change the binder mutex to an rt mutex to minimize instances where high priority surfaceflinger binder work is blocked by lower priority binder ipc. Signed-off-by: Riley Andrews Change-Id: I086a715267648448f0c5f62b037a3093d1079a79 --- drivers/staging/android/binder.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c index d4e529001934..9c821f398cad 100644 --- a/drivers/staging/android/binder.c +++ b/drivers/staging/android/binder.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -42,7 +43,7 @@ #include "binder.h" #include "binder_trace.h" -static DEFINE_MUTEX(binder_main_lock); +static DEFINE_RT_MUTEX(binder_main_lock); static DEFINE_MUTEX(binder_deferred_lock); static DEFINE_MUTEX(binder_mmap_lock); @@ -420,14 +421,14 @@ static long task_close_fd(struct binder_proc *proc, unsigned int fd) static inline void binder_lock(const char *tag) { trace_binder_lock(tag); - mutex_lock(&binder_main_lock); + rt_mutex_lock(&binder_main_lock); trace_binder_locked(tag); } static inline void binder_unlock(const char *tag) { trace_binder_unlock(tag); - mutex_unlock(&binder_main_lock); + rt_mutex_unlock(&binder_main_lock); } static void binder_set_nice(long nice) -- 2.34.1