5.15-stable review patch. If anyone has any objections, please let me know.
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From: Trond Myklebust trond.myklebust@hammerspace.com
[ 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 --- fs/nfsd/filecache.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-)
diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index 6cde6ef68996e..429ae485ebbbe 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -295,21 +295,14 @@ 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();