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nfsd: Clean up nfsd_file_put()

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[ Upstream commit 999397926ab3f78c7d1235cc4ca6e3c89d2769bf ]

Make it a little less racy, by removing the refcount_read() test. Then
remove the redundant 'is_hashed' variable.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Trond Myklebust
2022-03-31 09:54:02 -04:00
committed by Greg Kroah-Hartman
parent cf04df21a4
commit 9862064ca8
1 changed files with 3 additions and 10 deletions
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13
fs/nfsd/filecache.c
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@@ -301,21 +301,14 @@ nfsd_file_put_noref(struct nfsd_file *nf)
void
nfsd_file_put(struct nfsd_file *nf)
{
bool is_hashed;
set_bit(NFSD_FILE_REFERENCED, &nf->nf_flags);
if (refcount_read(&nf->nf_ref) > 2 || !nf->nf_file) {
nfsd_file_put_noref(nf);
return;
}
is_hashed = test_bit(NFSD_FILE_HASHED, &nf->nf_flags) != 0;
if (!is_hashed) {
if (test_bit(NFSD_FILE_HASHED, &nf->nf_flags) == 0) {
nfsd_file_flush(nf);
nfsd_file_put_noref(nf);
} else {
nfsd_file_put_noref(nf);
nfsd_file_schedule_laundrette();
if (nf->nf_file)
nfsd_file_schedule_laundrette();
}
if (atomic_long_read(&nfsd_filecache_count) >= NFSD_FILE_LRU_LIMIT)
nfsd_file_gc();