mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-31 14:23:49 +01:00
Marc-André Lureau
29f34d1dd6
The memfd & fuse tests will share more common code in the following commits to test hugetlb support. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Marc-André Lureau <[email protected]> Reviewed-by: Mike Kravetz <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Michal Hocko <[email protected]> Cc: David Herrmann <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
47 lines
814 B
C
47 lines
814 B
C
// SPDX-License-Identifier: GPL-2.0
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#define _GNU_SOURCE
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#define __EXPORTED_HEADERS__
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#include <stdio.h>
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#include <stdlib.h>
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#include <linux/fcntl.h>
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#include <linux/memfd.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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#include "common.h"
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int hugetlbfs_test = 0;
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/*
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* Copied from mlock2-tests.c
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*/
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unsigned long default_huge_page_size(void)
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{
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unsigned long hps = 0;
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char *line = NULL;
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size_t linelen = 0;
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FILE *f = fopen("/proc/meminfo", "r");
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if (!f)
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return 0;
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while (getline(&line, &linelen, f) > 0) {
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if (sscanf(line, "Hugepagesize: %lu kB", &hps) == 1) {
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hps <<= 10;
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break;
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}
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}
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free(line);
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fclose(f);
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return hps;
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}
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int sys_memfd_create(const char *name, unsigned int flags)
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{
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if (hugetlbfs_test)
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flags |= MFD_HUGETLB;
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return syscall(__NR_memfd_create, name, flags);
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}
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