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| author | Gilad Ben-Yossef <gilad@benyossef.com> | 2017-02-27 14:28:29 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-27 18:43:46 -0800 |
| commit | d31712009709774506e536a3cc1f7c512f550a0c (patch) | |
| tree | 585ef4a193d63365b9108e414afe146665559988 /lib/scatterlist.c | |
| parent | 1d5210ef706523529d3cc16fd70be0a466253466 (diff) | |
| download | lwn-d31712009709774506e536a3cc1f7c512f550a0c.tar.gz lwn-d31712009709774506e536a3cc1f7c512f550a0c.zip | |
scatterlist: do not disable IRQs in sg_copy_buffer
Commit 50bed2e2862a ("sg: disable interrupts inside sg_copy_buffer")
introduced disabling interrupts in sg_copy_buffer() since atomic uses of
miter required it due to use of kmap_atomic().
However, as commit 8290e2d2dcbf ("scatterlist: atomic sg_mapping_iter()
no longer needs disabled IRQs") acknowledges disabling interrupts is no
longer needed for calls to kmap_atomic() and therefore unneeded for
miter ops either, so remove it from sg_copy_buffer().
Link: http://lkml.kernel.org/r/1486040150-14109-3-git-send-email-gilad@benyossef.com
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: <ofir.drang@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/scatterlist.c')
| -rw-r--r-- | lib/scatterlist.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/lib/scatterlist.c b/lib/scatterlist.c index 393920fddcb9..c6cf82242d65 100644 --- a/lib/scatterlist.c +++ b/lib/scatterlist.c @@ -651,7 +651,6 @@ size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, void *buf, { unsigned int offset = 0; struct sg_mapping_iter miter; - unsigned long flags; unsigned int sg_flags = SG_MITER_ATOMIC; if (to_buffer) @@ -664,8 +663,6 @@ size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, void *buf, if (!sg_miter_skip(&miter, skip)) return false; - local_irq_save(flags); - while ((offset < buflen) && sg_miter_next(&miter)) { unsigned int len; @@ -681,7 +678,6 @@ size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, void *buf, sg_miter_stop(&miter); - local_irq_restore(flags); return offset; } EXPORT_SYMBOL(sg_copy_buffer); |