Annotate unused parameters on inline definitions as such

* libspl: umem: These are obviously and intentionally unused; annotate 
  them as such to appease -Wunused-parameter builds that include this 
  header.

* sys/dmu.h: In this case, clear_on_evict_dbufp is only used for 
  ZFS_DEBUG builds, so annotate it as __maybe_unused to appease 
  -Wunused-parameter.


Reviewed-By: Brian Behlendorf <[email protected]>
Signed-off-by: Kyle Evans <[email protected]>
Closes #10606 

1 files changed, 4 insertions, 3 deletions

diff --git a/lib/libspl/include/umem.h b/lib/libspl/include/umem.h
index 49e9f9c14..ef9026009 100644
--- a/lib/libspl/include/umem.h
+++ b/lib/libspl/include/umem.h
@@ -36,6 +36,7 @@
  *
  * https://labs.omniti.com/trac/portableumem
  */
+#include <sys/debug.h>
 
 #include <stdlib.h>
 #include <stdio.h>
@@ -131,13 +132,13 @@ umem_zalloc(size_t size, int flags)
 }
 
 static inline void
-umem_free(void *ptr, size_t size)
+umem_free(void *ptr, size_t size __maybe_unused)
 {
 	free(ptr);
 }
 
 static inline void
-umem_nofail_callback(umem_nofail_callback_t *cb)
+umem_nofail_callback(umem_nofail_callback_t *cb __maybe_unused)
 {}
 
 static inline umem_cache_t *
@@ -199,7 +200,7 @@ umem_cache_free(umem_cache_t *cp, void *ptr)
 }
 
 static inline void
-umem_cache_reap_now(umem_cache_t *cp)
+umem_cache_reap_now(umem_cache_t *cp __maybe_unused)
 {
 }