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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2018-05-04 16:32:45 +0200
committerJens Axboe <axboe@kernel.dk>2018-05-07 15:26:36 -0600
commitf3a1075e5fc3434f1b7af601180dd976b754ec0c (patch)
tree2863a95901ab2e0677373ef5b62ecde51b05d32b /block/bounce.c
parentf142f08bf7ecc41c3e71e05b765ea654047cf0c0 (diff)
block: don't disable interrupts during kmap_atomic()
bounce_copy_vec() disables interrupts around kmap_atomic(). This is a leftover from the old kmap_atomic() implementation which relied on fixed mapping slots, so the caller had to make sure that the same slot could not be reused from an interrupting context. kmap_atomic() was changed to dynamic slots long ago and commit 1ec9c5ddc17a ("include/linux/highmem.h: remove the second argument of k[un]map_atomic()") removed the slot assignements, but the callers were not checked for now redundant interrupt disabling. Remove the conditional interrupt disable. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bounce.c')
-rw-r--r--block/bounce.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/block/bounce.c b/block/bounce.c
index dd0b93f2a871..fea9c8146d82 100644
--- a/block/bounce.c
+++ b/block/bounce.c
@@ -63,14 +63,11 @@ __initcall(init_emergency_pool);
*/
static void bounce_copy_vec(struct bio_vec *to, unsigned char *vfrom)
{
- unsigned long flags;
unsigned char *vto;
- local_irq_save(flags);
vto = kmap_atomic(to->bv_page);
memcpy(vto + to->bv_offset, vfrom, to->bv_len);
kunmap_atomic(vto);
- local_irq_restore(flags);
}
#else /* CONFIG_HIGHMEM */