The following commit has been merged into the locking/core branch of tip:
Commit-ID: f730fd535fc51573f982fad629f2fc6b4a0cde2f
Gitweb: https://git.kernel.org/tip/f730fd535fc51573f982fad629f2fc6b4a0cde2f
Author: Uros Bizjak <ubizjak@xxxxxxxxx>
AuthorDate: Mon, 19 Aug 2024 09:41:15 +02:00
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Fri, 25 Oct 2024 10:01:50 +02:00
cleanup: Remove address space of returned pointer
Guard functions in local_lock.h are defined using DEFINE_GUARD() and
DEFINE_LOCK_GUARD_1() macros having lock type defined as pointer in
the percpu address space. The functions, defined by these macros
return value in generic address space, causing:
cleanup.h:157:18: error: return from pointer to non-enclosed address space
and
cleanup.h:214:18: error: return from pointer to non-enclosed address space
when strict percpu checks are enabled.
Add explicit casts to remove address space of the returned pointer.
Found by GCC's named address space checks.
Fixes: e4ab322fbaaa ("cleanup: Add conditional guard support")
Signed-off-by: Uros Bizjak <ubizjak@xxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20240819074124.143565-1-ubizjak@xxxxxxxxx
---
include/linux/cleanup.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/linux/cleanup.h b/include/linux/cleanup.h
index 038b2d5..518bd1f 100644
--- a/include/linux/cleanup.h
+++ b/include/linux/cleanup.h
@@ -290,7 +290,7 @@ static inline class_##_name##_t class_##_name##ext##_constructor(_init_args) \
#define DEFINE_GUARD(_name, _type, _lock, _unlock) \
DEFINE_CLASS(_name, _type, if (_T) { _unlock; }, ({ _lock; _T; }), _type _T); \
static inline void * class_##_name##_lock_ptr(class_##_name##_t *_T) \
- { return *_T; }
+ { return (void *)(__force unsigned long)*_T; }
#define DEFINE_GUARD_COND(_name, _ext, _condlock) \
EXTEND_CLASS(_name, _ext, \
@@ -347,7 +347,7 @@ static inline void class_##_name##_destructor(class_##_name##_t *_T) \
\
static inline void *class_##_name##_lock_ptr(class_##_name##_t *_T) \
{ \
- return _T->lock; \
+ return (void *)(__force unsigned long)_T->lock; \
}
|