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Subject[PATCH RFC PKS/PMEM 48/58] drivers/md: Utilize new kmap_thread()
Date
From: Ira Weiny <ira.weiny@intel.com>

These kmap() calls are localized to a single thread. To avoid the over
head of global PKRS updates use the new kmap_thread() call.

Cc: Coly Li <colyli@suse.de> (maintainer:BCACHE (BLOCK LAYER CACHE))
Cc: Kent Overstreet <kent.overstreet@gmail.com> (maintainer:BCACHE (BLOCK LAYER CACHE))
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
drivers/md/bcache/request.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index c7cadaafa947..a4571f6d09dd 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -44,10 +44,10 @@ static void bio_csum(struct bio *bio, struct bkey *k)
uint64_t csum = 0;

bio_for_each_segment(bv, bio, iter) {
- void *d = kmap(bv.bv_page) + bv.bv_offset;
+ void *d = kmap_thread(bv.bv_page) + bv.bv_offset;

csum = bch_crc64_update(csum, d, bv.bv_len);
- kunmap(bv.bv_page);
+ kunmap_thread(bv.bv_page);
}

k->ptr[KEY_PTRS(k)] = csum & (~0ULL >> 1);
--
2.28.0.rc0.12.gb6a658bd00c9
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