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| author | Bart Van Assche <bvanassche@acm.org> | 2024-02-02 12:39:21 -0800 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-02-06 14:30:47 +0100 |
| commit | e769779c0c2c3a475c6b7313d35ff0aa3aceb780 (patch) | |
| tree | e05f0c83bcba7080304b80ff5b849d6764fb9b18 /fs/fcntl.c | |
| parent | ec16b147a55bfa14e858234eb7b1a7c8e7cd5021 (diff) | |
| download | linux-e769779c0c2c3a475c6b7313d35ff0aa3aceb780.tar.gz linux-e769779c0c2c3a475c6b7313d35ff0aa3aceb780.tar.bz2 linux-e769779c0c2c3a475c6b7313d35ff0aa3aceb780.zip | |
fs: Verify write lifetime constants at compile time
The code in fs/fcntl.c converts RWH_* constants to and from WRITE_LIFE_*
constants using casts. Verify at compile time that these casts will yield
the intended effect.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240202203926.2478590-3-bvanassche@acm.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/fcntl.c')
| -rw-r--r-- | fs/fcntl.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/fcntl.c b/fs/fcntl.c index 3ff707bf2743..f3bc4662455f 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -270,6 +270,13 @@ static int f_getowner_uids(struct file *filp, unsigned long arg) static bool rw_hint_valid(u64 hint) { + BUILD_BUG_ON(WRITE_LIFE_NOT_SET != RWH_WRITE_LIFE_NOT_SET); + BUILD_BUG_ON(WRITE_LIFE_NONE != RWH_WRITE_LIFE_NONE); + BUILD_BUG_ON(WRITE_LIFE_SHORT != RWH_WRITE_LIFE_SHORT); + BUILD_BUG_ON(WRITE_LIFE_MEDIUM != RWH_WRITE_LIFE_MEDIUM); + BUILD_BUG_ON(WRITE_LIFE_LONG != RWH_WRITE_LIFE_LONG); + BUILD_BUG_ON(WRITE_LIFE_EXTREME != RWH_WRITE_LIFE_EXTREME); + switch (hint) { case RWH_WRITE_LIFE_NOT_SET: case RWH_WRITE_LIFE_NONE: |