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| author | Jens Axboe <jens.axboe@oracle.com> | 2007-10-26 11:32:16 +0400 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2007-10-29 11:18:03 +0300 |
| commit | 73fd546aa75e9db02526bf304d4f736c4ec82b4b (patch) | |
| tree | ad6f7889a799c6fd1e0ace77b55856cb5ad78230 /include/linux/scatterlist.h | |
| parent | 2a397e82c7db18019e408f953dd58dc1963a328c (diff) | |
| download | linux-73fd546aa75e9db02526bf304d4f736c4ec82b4b.tar.xz | |
SG: clear termination bit in sg_chain()
Since we are using the last entry in the list, clear any possible
termination bit that may have already been set. Pointed out by Rusty.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/scatterlist.h')
| -rw-r--r-- | include/linux/scatterlist.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h index 457123171389..b2ec8421b89f 100644 --- a/include/linux/scatterlist.h +++ b/include/linux/scatterlist.h @@ -179,7 +179,11 @@ static inline void sg_chain(struct scatterlist *prv, unsigned int prv_nents, #ifndef ARCH_HAS_SG_CHAIN BUG(); #endif - prv[prv_nents - 1].page_link = (unsigned long) sgl | 0x01; + /* + * Set lowest bit to indicate a link pointer, and make sure to clear + * the termination bit if it happens to be set. + */ + prv[prv_nents - 1].page_link = ((unsigned long) sgl | 0x01) & ~0x02; } /** |