linux-kernel - [PATCH v2 11/36] fs: add do_eventfd() helper; remove internal call to sys

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Message-Id: <20180315190529.20943-12-linux@dominikbrodowski.net>
Date:   Thu, 15 Mar 2018 20:05:04 +0100
From:   Dominik Brodowski <linux@...inikbrodowski.net>
To:     linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
        viro@...iv.linux.org.uk
Cc:     luto@...nel.org, mingo@...nel.org, akpm@...ux-foundation.org,
        arnd@...db.de
Subject: [PATCH v2 11/36] fs: add do_eventfd() helper; remove internal call to sys_eventfd()

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

Cc: Alexander Viro <viro@...iv.linux.org.uk>
Signed-off-by: Dominik Brodowski <linux@...inikbrodowski.net>
---
 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