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eventfd: add a BUILD_BUG_ON() to ensure consistency between EFD_SEMAPHORE and the uapi

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introduce a BUILD_BUG_ON to check that the EFD_SEMAPHORE is equal to its
definition in the uapi file, just like EFD_CLOEXEC and EFD_NONBLOCK.

Signed-off-by: Wen Yang <wenyang.linux@foxmail.com>
Link: https://lore.kernel.org/r/tencent_0BAA2DEAF9208D49987457E6583F9BE79507@qq.com
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jan Kara <jack@suse.cz>
Cc: <linux-fsdevel@vger.kernel.org>
Cc: <linux-kernel@vger.kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Wen Yang 2024-01-10 23:47:40 +08:00 committed by Christian Brauner
parent 6c8ac6e24e
commit 6b6ec4ca4e
1 changed files with 1 additions and 0 deletions
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fs/eventfd.c
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@ -383,6 +383,7 @@ static int do_eventfd(unsigned int count, int flags)
/* Check the EFD_* constants for consistency. */
BUILD_BUG_ON(EFD_CLOEXEC != O_CLOEXEC);
BUILD_BUG_ON(EFD_NONBLOCK != O_NONBLOCK);
BUILD_BUG_ON(EFD_SEMAPHORE != (1 << 0));
if (flags & ~EFD_FLAGS_SET)
return -EINVAL;