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selftests/vm: use memfd for hugepage-mmap test

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This test was overlooked with a hard-coded mntpoint path in test when
we're removing the hugetlb mntpoint in commit 0796c7b8be84.  Fix it up so
the test can keep running.

Link: https://lkml.kernel.org/r/Y3aojfUC2nSwbCzB@x1n
Fixes: 0796c7b8be84 ("selftests/vm: drop mnt point for hugetlb in run_vmtests.sh")
Signed-off-by: Peter Xu <peterx@redhat.com>
Reported-by: Joel Savitz <jsavitz@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Peter Xu 2022-11-17 16:29:15 -05:00 committed by Andrew Morton
parent 47939359ad
commit 91a99f1d12
1 changed files with 4 additions and 6 deletions
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10
tools/testing/selftests/vm/hugepage-mmap.c
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@ -16,14 +16,13 @@
* range.
* Other architectures, such as ppc64, i386 or x86_64 are not so constrained.
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/mman.h>
#include <fcntl.h>
#define FILE_NAME "huge/hugepagefile"
#define LENGTH (256UL*1024*1024)
#define PROTECTION (PROT_READ | PROT_WRITE)
@ -67,16 +66,16 @@ int main(void)
void *addr;
int fd, ret;
fd = open(FILE_NAME, O_CREAT | O_RDWR, 0755);
fd = memfd_create("hugepage-mmap", MFD_HUGETLB);
if (fd < 0) {
perror("Open failed");
perror("memfd_create() failed");
exit(1);
}
addr = mmap(ADDR, LENGTH, PROTECTION, FLAGS, fd, 0);
if (addr == MAP_FAILED) {
perror("mmap");
unlink(FILE_NAME);
close(fd);
exit(1);
}
@ -87,7 +86,6 @@ int main(void)
munmap(addr, LENGTH);
close(fd);
unlink(FILE_NAME);
return ret;
}