[PATCH v2 11/36] fs: add do_eventfd() helper; remove internal call to sys_eventfd()

From: Dominik Brodowski
Date: Thu Mar 15 2018 - 15:11:39 EST


Using this helper removes an in-kernel call to the sys_eventfd() syscall.

Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Dominik Brodowski <linux@xxxxxxxxxxxxxxxxxxxx>
---
fs/eventfd.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/fs/eventfd.c b/fs/eventfd.c
index 012f5bd46dfa..08d3bd602f73 100644
--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -380,7 +380,7 @@ struct eventfd_ctx *eventfd_ctx_fileget(struct file *file)
}
EXPORT_SYMBOL_GPL(eventfd_ctx_fileget);

-SYSCALL_DEFINE2(eventfd2, unsigned int, count, int, flags)
+static int do_eventfd(unsigned int count, int flags)
{
struct eventfd_ctx *ctx;
int fd;
@@ -409,8 +409,13 @@ SYSCALL_DEFINE2(eventfd2, unsigned int, count, int, flags)
return fd;
}

+SYSCALL_DEFINE2(eventfd2, unsigned int, count, int, flags)
+{
+ return do_eventfd(count, flags);
+}
+
SYSCALL_DEFINE1(eventfd, unsigned int, count)
{
- return sys_eventfd2(count, 0);
+ return do_eventfd(count, 0);
}

--
2.16.2