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| author | Jeff Layton <jlayton@redhat.com> | 2014-01-04 13:18:05 +0100 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2014-01-06 21:14:18 +0100 |
| commit | 0fdc26785d0a5bb33d9adb572307fd2d7a406734 (patch) | |
| tree | 85474a5723bbf22117c654f357aaa26e9999fdce /fs/nfsd | |
| parent | sunrpc: fix potential race between setting use_gss_proxy and the upcall rpc_clnt (diff) | |
| download | linux-0fdc26785d0a5bb33d9adb572307fd2d7a406734.tar.xz linux-0fdc26785d0a5bb33d9adb572307fd2d7a406734.zip | |
sunrpc: get rid of use_gssp_lock
We can achieve the same result with a cmpxchg(). This also fixes a
potential race in use_gss_proxy(). The value of sn->use_gss_proxy could
go from -1 to 1 just after we check it in use_gss_proxy() but before we
acquire the spinlock. The procfile write would end up returning success
but the value would flip to 0 soon afterward. With this method we not
only avoid locking but the first "setter" always wins.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
0 files changed, 0 insertions, 0 deletions