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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 11:34:37 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:15:39 +0200 |
| commit | 2fc96f8331ba7d08ddc126d154a1504b9a79b79e (patch) | |
| tree | e285a734bc1b9a79d6d99b1eec0699f9a12f51f0 /fs/eventfd.c | |
| parent | 52fb6db0fd6f50ac71475f02b96098fbb1fb3417 (diff) | |
| download | lwn-2fc96f8331ba7d08ddc126d154a1504b9a79b79e.tar.gz lwn-2fc96f8331ba7d08ddc126d154a1504b9a79b79e.zip | |
fs: add do_eventfd() helper; remove internal call to sys_eventfd()
Using this helper removes an in-kernel call to the sys_eventfd() syscall.
This patch is part of a series which removes in-kernel calls to syscalls.
On this basis, the syscall entry path can be streamlined. For details, see
http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'fs/eventfd.c')
| -rw-r--r-- | fs/eventfd.c | 9 |
1 files 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); } |