[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-trivial] [PATCH] oslib-posix: Fix compiler warning (-Wclobbered) a
From: |
Stefan Weil |
Subject: |
[Qemu-trivial] [PATCH] oslib-posix: Fix compiler warning (-Wclobbered) and simplify the code |
Date: |
Sun, 1 Mar 2015 13:52:06 +0100 |
gcc reports this warning with -Wclobbered:
util/oslib-posix.c: In function ‘os_mem_prealloc’:
util/oslib-posix.c:374:49: error: argument ‘memory’ might be clobbered by
‘longjmp’ or ‘vfork’ [-Werror=clobbered]
Fix this and simplify the code by using an existing macro.
Signed-off-by: Stefan Weil <address@hidden>
---
util/oslib-posix.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/util/oslib-posix.c b/util/oslib-posix.c
index 16fcec2..37ffd96 100644
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -399,10 +399,10 @@ void os_mem_prealloc(int fd, char *area, size_t memory)
} else {
int i;
size_t hpagesize = fd_getpagesize(fd);
+ size_t numpages = DIV_ROUND_UP(memory, hpagesize);
/* MAP_POPULATE silently ignores failures */
- memory = (memory + hpagesize - 1) & -hpagesize;
- for (i = 0; i < (memory / hpagesize); i++) {
+ for (i = 0; i < numpages; i++) {
memset(area + (hpagesize * i), 0, 1);
}
--
1.7.10.4
- [Qemu-trivial] [PATCH] oslib-posix: Fix compiler warning (-Wclobbered) and simplify the code,
Stefan Weil <=