[XFS] Fix sparse warnings in ktrace.[ch]

SGI-PV: 943556
SGI-Modid: xfs-linux:xfs-kern:200113a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

fs/xfs/support/ktrace.c

@@ -50,7 +50,7 @@ ktrace_uninit(void)
  * number of entries.
  */
 ktrace_t *
-ktrace_alloc(int nentries, int sleep)
+ktrace_alloc(int nentries, unsigned int __nocast sleep)
 {
 	ktrace_t        *ktp;
 	ktrace_entry_t  *ktep;