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linux/security/integrity/evm
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Mateusz Guzik 699ae62419 evm: stop avoidably reading i_writecount in evm_file_release 
The EVM_NEW_FILE flag is unset if the file already existed at the time
of open and this can be checked without looking at i_writecount.

Not accessing it reduces traffic on the cacheline during parallel open
of the same file and drop the evm_file_release routine from second place
to bottom of the profile.

Fixes: 75a323e604 ("evm: Make it independent from 'integrity' LSM")
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Reviewed-by: Roberto Sassu <roberto.sassu@huawei.com>
Cc: stable@vger.kernel.org # 6.9+
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
History 2024-10-09 22:49:40 -04:00
..
evm.h evm: Store and detect metadata inode attributes changes 2024-04-09 17:14:57 -04:00
evm_crypto.c evm: Store and detect metadata inode attributes changes 2024-04-09 17:14:57 -04:00
evm_main.c evm: stop avoidably reading i_writecount in evm_file_release 2024-10-09 22:49:40 -04:00
evm_posix_acl.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
evm_secfs.c fs: port ->setattr() to pass mnt_idmap 2023-01-19 09:24:02 +01:00
Kconfig evm: Make it independent from 'integrity' LSM 2024-02-15 23:43:47 -05:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00