xfs: Fix typo in comment

s/somethign/something/
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>

fs/xfs/xfs_log_priv.h

@@ -681,7 +681,7 @@ xlog_valid_lsn(
  * flags to control the kmalloc() behaviour within kvmalloc(). Hence kmalloc()
  * will do direct reclaim and compaction in the slow path, both of which are
  * horrendously expensive. We just want kmalloc to fail fast and fall back to
- * vmalloc if it can't get somethign straight away from the free lists or
+ * vmalloc if it can't get something straight away from the free lists or
  * buddy allocator. Hence we have to open code kvmalloc outselves here.
  *
  * This assumes that the caller uses memalloc_nofs_save task context here, so