diff options
| author | Rusty Russell <rusty@rustcorp.com.au> | 2013-05-30 09:19:35 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-05-30 09:20:20 +0200 |
| commit | ac4e97abce9b80c020e7113325f49e58b7b15e3f (patch) | |
| tree | 6b1395a60b4e28a34f4e3693fbfb3df98008a20b | |
| parent | 4997b72ee62930cb841d185398ea547d979789f4 (diff) | |
scatterlist: sg_set_buf() argument must be in linear mapping
Add a check behind CONFIG_DEBUG_SG to verify this.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | include/linux/scatterlist.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h index 5951e3f38878..26806775b11b 100644 --- a/include/linux/scatterlist.h +++ b/include/linux/scatterlist.h @@ -111,6 +111,9 @@ static inline struct page *sg_page(struct scatterlist *sg) static inline void sg_set_buf(struct scatterlist *sg, const void *buf, unsigned int buflen) { +#ifdef CONFIG_DEBUG_SG + BUG_ON(!virt_addr_valid(buf)); +#endif sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf)); } |