From: Ira Weiny <[email protected]> btrfsic_read_block() (which calls kmap()) and btrfsic_release_block_ctx() (which calls kunmap()) are always called within a single thread of execution.
Therefore the mappings created within these calls can be a thread local mapping. Convert the kmap() of bloc_ctx->pagev to kmap_local_page(). Luckily the unmap loops backwards through the array pointer so no adjustment needs to be made to the unmapping order. Signed-off-by: Ira Weiny <[email protected]> --- fs/btrfs/check-integrity.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c index 726eb894be8b..1ff9e19508a7 100644 --- a/fs/btrfs/check-integrity.c +++ b/fs/btrfs/check-integrity.c @@ -1558,7 +1558,7 @@ static void btrfsic_release_block_ctx(struct btrfsic_block_data_ctx *block_ctx) while (num_pages > 0) { num_pages--; if (block_ctx->datav[num_pages]) { - kunmap(block_ctx->pagev[num_pages]); + kunmap_local(block_ctx->datav[num_pages]); block_ctx->datav[num_pages] = NULL; } if (block_ctx->pagev[num_pages]) { @@ -1637,7 +1637,7 @@ static int btrfsic_read_block(struct btrfsic_state *state, i = j; } for (i = 0; i < num_pages; i++) - block_ctx->datav[i] = kmap(block_ctx->pagev[i]); + block_ctx->datav[i] = kmap_local_page(block_ctx->pagev[i]); return block_ctx->len; } -- 2.28.0.rc0.12.gb6a658bd00c9
