tree 3b1db04c854b6ccc4752560f0d30c85e6cbbda6a
parent 4e78064f42ad474ce9c31760861f7fb0cfc22532
author NeilBrown <neilb@suse.de> 1288074834 +1100
committer NeilBrown <neilb@suse.de> 1288247766 +1100

md: use bio_kmalloc rather than bio_alloc when failure is acceptable.

bio_alloc can never fail (as it uses a mempool) but an block
indefinitely, especially if the caller is holding a reference to a
previously allocated bio.

So these to places which both handle failure and hold multiple bios
should not use bio_alloc, they should use bio_kmalloc.

Signed-off-by: NeilBrown <neilb@suse.de>