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nfsd: clean up sparse endianness warnings in nfscache.c

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We currently hash the XID to determine a hash bucket to use for the
reply cache entry, which is fed into hash_32 without byte-swapping it.
Add __force to make sparse happy, and add some comments to explain
why.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Jeff Layton 2014-06-17 07:44:12 -04:00 committed by J. Bruce Fields
parent f419992c1f
commit b3d8d1284a
1 changed files with 11 additions and 2 deletions
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13
fs/nfsd/nfscache.c
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@ -221,7 +221,12 @@ static void
hash_refile(struct svc_cacherep *rp)
{
hlist_del_init(&rp->c_hash);
hlist_add_head(&rp->c_hash, cache_hash + hash_32(rp->c_xid, maskbits));
/*
* No point in byte swapping c_xid since we're just using it to pick
* a hash bucket.
*/
hlist_add_head(&rp->c_hash, cache_hash +
hash_32((__force u32)rp->c_xid, maskbits));
}
/*
@ -356,7 +361,11 @@ nfsd_cache_search(struct svc_rqst *rqstp, __wsum csum)
struct hlist_head *rh;
unsigned int entries = 0;
rh = &cache_hash[hash_32(rqstp->rq_xid, maskbits)];
/*
* No point in byte swapping rq_xid since we're just using it to pick
* a hash bucket.
*/
rh = &cache_hash[hash_32((__force u32)rqstp->rq_xid, maskbits)];
hlist_for_each_entry(rp, rh, c_hash) {
++entries;
if (nfsd_cache_match(rqstp, csum, rp)) {