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Commit ac4e97ab authored by Rusty Russell's avatar Rusty Russell Committed by Jens Axboe
Browse files

scatterlist: sg_set_buf() argument must be in linear mapping 



Add a check behind CONFIG_DEBUG_SG to verify this.

Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 4997b72e

include/linux/scatterlist.h

+3 −0
Original line number Diff line number Diff line
@@ -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));

}