diff options
| author |   Jens Axboe <axboe@kernel.dk> | 2018-06-29 08:48:06 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-06-29 08:48:06 -0600 |
| commit | 9544bc5347207a68eb308cc8aaaed6c3a687cabd (patch) | |
| tree | 94a63c95fc1841e67aeddc0ddc9ab1872facc8ba /lib | |
| parent | Merge branch 'nvme-4.18' of git://git.infradead.org/nvme into for-linus (diff) | |
| download | linux-dev-9544bc5347207a68eb308cc8aaaed6c3a687cabd.tar.xz linux-dev-9544bc5347207a68eb308cc8aaaed6c3a687cabd.zip | |
sg: remove ->sg_magic member
This was introduced more than a decade ago when sg chaining was
added, but we never really caught anything with it. The scatterlist
entry size can be critical, since drivers allocate it, so remove
the magic member. Recently it's been triggering allocation stalls
and failures in NVMe.
Tested-by: Jordan Glover <Golden_Miller83@protonmail.ch>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/scatterlist.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/lib/scatterlist.c b/lib/scatterlist.c index 06dad7a072fd..d4ae67d6cd1e 100644 --- a/lib/scatterlist.c +++ b/lib/scatterlist.c @@ -24,9 +24,6 @@ **/ struct scatterlist *sg_next(struct scatterlist *sg) { -#ifdef CONFIG_DEBUG_SG - BUG_ON(sg->sg_magic != SG_MAGIC); -#endif if (sg_is_last(sg)) return NULL; @@ -111,10 +108,7 @@ struct scatterlist *sg_last(struct scatterlist *sgl, unsigned int nents) for_each_sg(sgl, sg, nents, i) ret = sg; -#ifdef CONFIG_DEBUG_SG - BUG_ON(sgl[0].sg_magic != SG_MAGIC); BUG_ON(!sg_is_last(ret)); -#endif return ret; } EXPORT_SYMBOL(sg_last); |