Messages in this thread Patch in this message | | | Date | Tue, 3 Sep 2013 10:29:30 -0400 | From | Tejun Heo <> | Subject | [GIT PULL] percpu changes for v3.12-rc1 |
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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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