Disable BH when taking per-cpu spin locks. This isn't an issue
right now because the only user zswap calls scomp from process
context. However, if scomp is called from softirq context the
spin lock may dead-lock.
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
---
crypto/scompress.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/crypto/scompress.c b/crypto/scompress.c
index 9b6d9bbbc73a..a2ce481a10bb 100644
--- a/crypto/scompress.c
+++ b/crypto/scompress.c
@@ -182,7 +182,7 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
dlen = req->dlen;
scratch = raw_cpu_ptr(&scomp_scratch);
- spin_lock(&scratch->lock);
+ spin_lock_bh(&scratch->lock);
if (sg_nents(req->src) == 1 && !PageHighMem(sg_page(req->src))) {
src = page_to_virt(sg_page(req->src)) + req->src->offset;
@@ -230,7 +230,7 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
}
}
out:
- spin_unlock(&scratch->lock);
+ spin_unlock_bh(&scratch->lock);
return ret;
}
--
2.39.5
