diff options
| author | Christoph Lameter <cl@linux.com> | 2013-08-23 19:01:58 +0000 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2013-08-23 16:08:27 -0400 |
| commit | abec1a806e0c3cf168999667d5fb6218398ef12a (patch) | |
| tree | 167e441fc26b6b404366d0310e41e32f52869ec6 /include/linux | |
| parent | a4244454df1296e90cc961c1b636b1176ef0d9a0 (diff) | |
percpu: Make __verify_pcu_ptr handle per cpu pointers to arrays
__verify_pcpu_ptr() will cause a compilation failure if the type of the
pointer is a pointer to a fixed array of objects. Adding zero to the
pointer converts the type of pointer to that pointing to a single
object of the array.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/percpu-defs.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h index 27ef6b190ea6..57e890abe1f0 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) |