提交 bc4e54f6 编写于 作者: M Michal Hocko 提交者: Linus Torvalds

drivers/md/bcache/super.c: use kvmalloc

bcache_device_init uses kmalloc for small requests and vmalloc for those
which are larger than 64 pages.  This alone is a strange criterion.
Moreover kmalloc can fallback to vmalloc on the failure.  Let's simply
use kvmalloc instead as it knows how to handle the fallback properly

Link: http://lkml.kernel.org/r/20170306103327.2766-5-mhocko@kernel.orgSigned-off-by: NMichal Hocko <mhocko@suse.com>
Acked-by: NVlastimil Babka <vbabka@suse.cz>
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 d224e938
......@@ -767,16 +767,12 @@ static int bcache_device_init(struct bcache_device *d, unsigned block_size,
}
n = d->nr_stripes * sizeof(atomic_t);
d->stripe_sectors_dirty = n < PAGE_SIZE << 6
? kzalloc(n, GFP_KERNEL)
: vzalloc(n);
d->stripe_sectors_dirty = kvzalloc(n, GFP_KERNEL);
if (!d->stripe_sectors_dirty)
return -ENOMEM;
n = BITS_TO_LONGS(d->nr_stripes) * sizeof(unsigned long);
d->full_dirty_stripes = n < PAGE_SIZE << 6
? kzalloc(n, GFP_KERNEL)
: vzalloc(n);
d->full_dirty_stripes = kvzalloc(n, GFP_KERNEL);
if (!d->full_dirty_stripes)
return -ENOMEM;
......
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