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| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2018-09-24 19:15:37 +0200 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2018-09-30 21:35:17 +0200 |
| commit | 28d52235ee25ba7d843242b4cb3c3f27a8828b5a (patch) | |
| tree | d7943419c107060c860c15dce0239f10d29a0724 | |
| parent | NFSv3: Improve NFSv3 performance when server returns no post-op attributes (diff) | |
| download | linux-28d52235ee25ba7d843242b4cb3c3f27a8828b5a.tar.xz linux-28d52235ee25ba7d843242b4cb3c3f27a8828b5a.zip | |
NFSv4: Save a few bytes in the nfs_pgio_args/res
Save a few bytes by allowing the read/write specific fields of the
structures to share storage.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
| -rw-r--r-- | include/linux/nfs_xdr.h | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 7f5535e5e852..343e44166346 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -608,9 +608,13 @@ struct nfs_pgio_args { __u32 count; unsigned int pgbase; struct page ** pages; - unsigned int replen; /* used by read */ - const u32 * bitmask; /* used by write */ - enum nfs3_stable_how stable; /* used by write */ + union { + unsigned int replen; /* used by read */ + struct { + const u32 * bitmask; /* used by write */ + enum nfs3_stable_how stable; /* used by write */ + }; + }; }; struct nfs_pgio_res { @@ -618,10 +622,16 @@ struct nfs_pgio_res { struct nfs_fattr * fattr; __u32 count; __u32 op_status; - int eof; /* used by read */ - unsigned int replen; /* used by read */ - struct nfs_writeverf * verf; /* used by write */ - const struct nfs_server *server; /* used by write */ + union { + struct { + unsigned int replen; /* used by read */ + int eof; /* used by read */ + }; + struct { + struct nfs_writeverf * verf; /* used by write */ + const struct nfs_server *server; /* used by write */ + }; + }; }; /* |