A recent patch to simplify the lustre large memory allocation
causes new warnings as an unintended side-effect:
lustre/lov/lov_request.c: In function 'lov_finish_set':
lustre/lov/lov_request.c:78:7: warning: unused variable 'len' [-Wunused-variable]
int len = set->set_oabufs * sizeof(*set->set_pga);
^
lustre/obdclass/acl.c: In function 'lustre_ext_acl_xattr_reduce_space':
lustre/obdclass/acl.c:123:6: warning: unused variable 'old_size' [-Wunused-variable]
int old_size = CFS_ACL_XATTR_SIZE(old_count, ext_acl_xattr);
^
The reason is that the 'size' argument to OBD_FREE_LARGE()
is never needed, which was previously hidden by the extra
abstractions.
This avoids the warnings by adding a cast to void, to tell
the compiler that the argument is intentionally unused.
A better fix is probably to remove the entire set of allocation
macros and open-code the normal kernel interface calls.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Fixes: 99d56ff7c1c ("staging/lustre: Always try kmalloc first for OBD_ALLOC_LARGE")
diff --git a/drivers/staging/lustre/lustre/include/obd_support.h b/drivers/staging/lustre/lustre/include/obd_support.h
index 379266d6bcd9..c0136ee778e3 100644
--- a/drivers/staging/lustre/lustre/include/obd_support.h
+++ b/drivers/staging/lustre/lustre/include/obd_support.h
@@ -688,6 +688,7 @@ do { \
#define OBD_FREE_LARGE(ptr, size) \
do { \
+ (void)(size); \
kvfree(ptr); \
} while (0)
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