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authorOleg Nesterov <oleg@redhat.com>2015-07-21 18:45:57 +0300
committerOleg Nesterov <oleg@redhat.com>2015-08-15 14:52:10 +0300
commit9287f6925ad9d8fb8c6283066b4f77fd87f123a9 (patch)
tree45da8cd0ac42defea9ca9e1efee0dc6daf4189b4 /include/linux/percpu-rwsem.h
parent0e28e01f1e73015d8e1b8fa1cda071d0bd9a2600 (diff)
downloadlinux-9287f6925ad9d8fb8c6283066b4f77fd87f123a9.tar.xz
percpu-rwsem: introduce percpu_down_read_trylock()
Add percpu_down_read_trylock(), it will have the user soon. Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Diffstat (limited to 'include/linux/percpu-rwsem.h')
-rw-r--r--include/linux/percpu-rwsem.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h
index 3e88c9a7d57f..16c30cd33501 100644
--- a/include/linux/percpu-rwsem.h
+++ b/include/linux/percpu-rwsem.h
@@ -16,6 +16,7 @@ struct percpu_rw_semaphore {
};
extern void percpu_down_read(struct percpu_rw_semaphore *);
+extern int percpu_down_read_trylock(struct percpu_rw_semaphore *);
extern void percpu_up_read(struct percpu_rw_semaphore *);
extern void percpu_down_write(struct percpu_rw_semaphore *);