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| author | Milosz Tanski <milosz@adfin.com> | 2013-09-06 20:41:20 +0400 |
|---|---|---|
| committer | Milosz Tanski <milosz@adfin.com> | 2013-09-06 20:41:20 +0400 |
| commit | cd0a2df681ec2af45f50c555c2a39dc92a4dff71 (patch) | |
| tree | 35d2278a9494582025f3dac08feb2266adef6a4d /net/sunrpc/xdr.c | |
| parent | c35455791c1131e7ccbf56ea6fbdd562401c2ce2 (diff) | |
| parent | 5a6f282a2052bb13171b53f03b34501cf72c33f1 (diff) | |
| download | linux-cd0a2df681ec2af45f50c555c2a39dc92a4dff71.tar.xz | |
Merge tag 'fscache-fixes-for-ceph' into wip-fscache
Patches for Ceph FS-Cache support
Diffstat (limited to 'net/sunrpc/xdr.c')
| -rw-r--r-- | net/sunrpc/xdr.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c index 75edcfad6e26..1504bb11e4f3 100644 --- a/net/sunrpc/xdr.c +++ b/net/sunrpc/xdr.c @@ -207,10 +207,13 @@ _shift_data_right_pages(struct page **pages, size_t pgto_base, pgfrom_base -= copy; vto = kmap_atomic(*pgto); - vfrom = kmap_atomic(*pgfrom); - memmove(vto + pgto_base, vfrom + pgfrom_base, copy); + if (*pgto != *pgfrom) { + vfrom = kmap_atomic(*pgfrom); + memcpy(vto + pgto_base, vfrom + pgfrom_base, copy); + kunmap_atomic(vfrom); + } else + memmove(vto + pgto_base, vto + pgfrom_base, copy); flush_dcache_page(*pgto); - kunmap_atomic(vfrom); kunmap_atomic(vto); } while ((len -= copy) != 0); |