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selftests/powerpc: use MAP_FAILED instead of (void *)-1 in tm-signal-context-force-tm

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mmap() is documented to return MAP_FAILED on error, but
tm-signal-context-force-tm.c compares the return value against
(void *)-1. Replace these with the standard MAP_FAILED macro for
better readability and type safety.

Signed-off-by: longlong yan <yanlonglong@kylinos.cn>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Reviewed-by: Amit Machhiwal <amachhiw@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260722023428.932-1-yanlonglong@kylinos.cn
This commit is contained in:
longlong yan 2026-07-22 10:34:28 +08:00 committed by Madhavan Srinivasan
parent e58b9d9097
commit bf1d828781
1 changed files with 2 additions and 2 deletions
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4
tools/testing/selftests/powerpc/tm/tm-signal-context-force-tm.c
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@ -60,7 +60,7 @@ void usr_signal_handler(int signo, siginfo_t *si, void *uc)
ucp->uc_link = mmap(NULL, sizeof(ucontext_t),
PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
if (ucp->uc_link == (void *)-1) {
if (ucp->uc_link == MAP_FAILED) {
perror("Mmap failed");
exit(-1);
}
@ -129,7 +129,7 @@ void tm_trap_test(void)
ss.ss_size = SIGSTKSZ;
ss.ss_flags = 0;
if (ss.ss_sp == (void *)-1) {
if (ss.ss_sp == MAP_FAILED) {
perror("mmap error\n");
exit(-1);
}