git: e3b8e55e710b - main - netbsd-tests: Fix the mmap_truncate_signal test

The branch main has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=e3b8e55e710bf355f371d798aa943281007a7ea9

commit e3b8e55e710bf355f371d798aa943281007a7ea9
Author:     Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2026-04-26 01:53:45 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2026-04-26 01:56:14 +0000

    netbsd-tests: Fix the mmap_truncate_signal test
    
    Add a volatile qualifier in the loop which triggers SIGBUS, as otherwise
    the compiler is smart enough to elide it, replacing it with a check for
    page != 0.
    
    MFC after:      1 week
---
 contrib/netbsd-tests/lib/libc/sys/t_mmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/contrib/netbsd-tests/lib/libc/sys/t_mmap.c b/contrib/netbsd-tests/lib/libc/sys/t_mmap.c
index b62c6299d3c2..5b9685658f65 100644
--- a/contrib/netbsd-tests/lib/libc/sys/t_mmap.c
+++ b/contrib/netbsd-tests/lib/libc/sys/t_mmap.c
@@ -504,7 +504,7 @@ ATF_TC_BODY(mmap_truncate_signal, tc)
 		ATF_REQUIRE(signal(SIGSEGV, map_sighandler) != SIG_ERR);
 		sta = 0;
 		for (i = 0; i < page; i++)
-			sta += map[i];
+			sta += ((volatile char *)map)[i];
 		/* child never will get this far, but the compiler will
 		   not know, so better use the values calculated to
 		   prevent the access to be optimized out */