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From: Sergei Zviagintsev <sergei@s15v.net>
Date: Wed, 10 Jun 2015 00:00:04 +0300
Subject: [PATCH] selftests/kdbus: fix precedence issues in macros
`item' argument in KDBUS_ITEM_NEXT macro is not enclosed into
parentheses when the cast operator is applied, which leads to improper
type conversion if `item' is supplied as a complex expression, e.g.
KDBUS_ITEM_NEXT(condition ? a : b)
RUN_CLONE_CHILD macro has similar issue, missing parentheses around
`clone_ret' when using indirection operator.
Use parentheses properly to guarantee right precedence.
Signed-off-by: Sergei Zviagintsev <sergei@s15v.net>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
tools/testing/selftests/kdbus/kdbus-util.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/kdbus/kdbus-util.h b/tools/testing/selftests/kdbus/kdbus-util.h
index b53b03f0565c..df5721ee8f54 100644
--- a/tools/testing/selftests/kdbus/kdbus-util.h
+++ b/tools/testing/selftests/kdbus/kdbus-util.h
@@ -27,7 +27,7 @@
#define KDBUS_ITEM_SIZE(s) KDBUS_ALIGN8((s) + KDBUS_ITEM_HEADER_SIZE)
#define KDBUS_ITEM_NEXT(item) \
- (typeof(item))(((uint8_t *)item) + KDBUS_ALIGN8((item)->size))
+ (typeof(item))((uint8_t *)(item) + KDBUS_ALIGN8((item)->size))
#define KDBUS_ITEM_FOREACH(item, head, first) \
for (item = (head)->first; \
((uint8_t *)(item) < (uint8_t *)(head) + (head)->size) && \
@@ -104,7 +104,7 @@ extern int kdbus_util_verbose;
_setup_; \
efd = eventfd(0, EFD_CLOEXEC); \
ASSERT_RETURN(efd >= 0); \
- *clone_ret = 0; \
+ *(clone_ret) = 0; \
pid = syscall(__NR_clone, flags, NULL); \
if (pid == 0) { \
eventfd_t event_status = 0; \
@@ -129,7 +129,7 @@ extern int kdbus_util_verbose;
ret = TEST_OK; \
} else { \
ret = -errno; \
- *clone_ret = -errno; \
+ *(clone_ret) = -errno; \
} \
close(efd); \
ret; \
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