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Diffstat (limited to 'fs/cifs/cifssmb.c')
-rw-r--r--fs/cifs/cifssmb.c26
1 files changed, 0 insertions, 26 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 2a9b27387708..f27b13ea08b8 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -86,32 +86,6 @@ static struct {
#endif /* CONFIG_CIFS_WEAK_PW_HASH */
#endif /* CIFS_POSIX */
-#ifdef CONFIG_HIGHMEM
-/*
- * On arches that have high memory, kmap address space is limited. By
- * serializing the kmap operations on those arches, we ensure that we don't
- * end up with a bunch of threads in writeback with partially mapped page
- * arrays, stuck waiting for kmap to come back. That situation prevents
- * progress and can deadlock.
- */
-static DEFINE_MUTEX(cifs_kmap_mutex);
-
-static inline void
-cifs_kmap_lock(void)
-{
- mutex_lock(&cifs_kmap_mutex);
-}
-
-static inline void
-cifs_kmap_unlock(void)
-{
- mutex_unlock(&cifs_kmap_mutex);
-}
-#else /* !CONFIG_HIGHMEM */
-#define cifs_kmap_lock() do { ; } while(0)
-#define cifs_kmap_unlock() do { ; } while(0)
-#endif /* CONFIG_HIGHMEM */
-
/*
* Mark as invalid, all open files on tree connections since they
* were closed when session to server was lost.