Hello, Linus.
Just a single patch to update type verification macro for percpu
accessors. Christoph is trying to replace __get_cpu_var() with
this_cpu accessors which needs this update. There are still some
issues to be resolved but eventually the conversion patches are likely
to be routed through different trees, so I think it'd be convenient to
merge this commit early.
Thanks.
The following changes since commit a4244454df1296e90cc961c1b636b1176ef0d9a0:
percpu-refcount: use RCU-sched insted of normal RCU (2013-06-16 16:12:26
-0700)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu.git for-3.12
for you to fetch changes up to abec1a806e0c3cf168999667d5fb6218398ef12a:
percpu: Make __verify_pcu_ptr handle per cpu pointers to arrays (2013-08-23
16:08:27 -0400)
----------------------------------------------------------------
Christoph Lameter (1):
percpu: Make __verify_pcu_ptr handle per cpu pointers to arrays
include/linux/percpu-defs.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
index 27ef6b1..57e890a 100644
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -22,9 +22,12 @@
* Macro which verifies @ptr is a percpu pointer without evaluating
* @ptr. This is to be used in percpu accessors to verify that the
* input parameter is a percpu pointer.
+ *
+ * + 0 is required in order to convert the pointer type from a
+ * potential array type to a pointer to a single item of the array.
*/
#define __verify_pcpu_ptr(ptr) do { \
- const void __percpu *__vpp_verify = (typeof(ptr))NULL; \
+ const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
(void)__vpp_verify; \
} while (0)
--
tejun
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