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| author | Ming Lei <ming.lei@redhat.com> | 2024-02-25 11:01:41 +0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-03-02 09:15:01 -0800 |
| commit | 7838b4656110d950afdd92a081cc0f33e23e0ea8 (patch) | |
| tree | e95689b199bb60bf8dbf6aac556b5f30bd11aeb3 /lib | |
| parent | 7fd664466a8f8e50099ce0a7bb40515782cb3569 (diff) | |
block: define bvec_iter as __packed __aligned(4)
In commit 19416123ab3e ("block: define 'struct bvec_iter' as packed"),
what we need is to save the 4byte padding, and avoid `bio` to spread on
one extra cache line.
It is enough to define it as '__packed __aligned(4)', as '__packed'
alone means byte aligned, and can cause compiler to generate horrible
code on architectures that don't support unaligned access in case that
bvec_iter is embedded in other structures.
Cc: Mikulas Patocka <mpatocka@redhat.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixes: 19416123ab3e ("block: define 'struct bvec_iter' as packed")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions