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authorRob Norris <[email protected]>2024-05-28 11:56:41 -0400
committerTony Hutter <[email protected]>2024-07-16 15:33:46 -0700
commit3ea3649755d4a684a7e04a0c6a5eb3df8f87b27b (patch)
treeaa6fe633ebb7b1b964f0e6e7fe5beb34dd1f8d9b /module/os/linux
parent0342c4a6b22d872beb286a09004706f521061c24 (diff)
Linux 6.10: work harder to avoid kmem_cache_alloc reuse
Linux 6.10 change kmem_cache_alloc to be a macro, rather than a function, such that the old #undef for it in spl-kmem-cache.c would remove its definition completely, breaking the build. This inverts the model used before. Rather than always defining the kmem_cache_* macro, then undefining then inside spl-kmem-cache.c, instead we make a special tag to indicate we're currently inside spl-kmem-cache.c, and not defining those in macros in the first place, so we can use the kernel-supplied kmem_cache_* functions to implement spl_kmem_cache_*, as we expect. For all other callers, we create the macros as normal and remove access to the kernel's own conflicting names. Signed-off-by: Rob Norris <[email protected]> Sponsored-by: https://despairlabs.com/sponsor/ Reviewed-by: Tony Hutter <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]>
Diffstat (limited to 'module/os/linux')
-rw-r--r--module/os/linux/spl/spl-kmem-cache.c12
1 files changed, 2 insertions, 10 deletions
diff --git a/module/os/linux/spl/spl-kmem-cache.c b/module/os/linux/spl/spl-kmem-cache.c
index 42821ad60..737c2e063 100644
--- a/module/os/linux/spl/spl-kmem-cache.c
+++ b/module/os/linux/spl/spl-kmem-cache.c
@@ -21,6 +21,8 @@
* with the SPL. If not, see <http://www.gnu.org/licenses/>.
*/
+#define SPL_KMEM_CACHE_IMPLEMENTING
+
#include <linux/percpu_compat.h>
#include <sys/kmem.h>
#include <sys/kmem_cache.h>
@@ -34,16 +36,6 @@
#include <linux/prefetch.h>
/*
- * Within the scope of spl-kmem.c file the kmem_cache_* definitions
- * are removed to allow access to the real Linux slab allocator.
- */
-#undef kmem_cache_destroy
-#undef kmem_cache_create
-#undef kmem_cache_alloc
-#undef kmem_cache_free
-
-
-/*
* Linux 3.16 replaced smp_mb__{before,after}_{atomic,clear}_{dec,inc,bit}()
* with smp_mb__{before,after}_atomic() because they were redundant. This is
* only used inside our SLAB allocator, so we implement an internal wrapper