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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef NOMMU_H
#define NOMMU_H
#include <stdio.h>
#include <string.h>
/* Returns 1 for NOMMU, 0 for MMU, and -1 if /proc/meminfo is unavailable. */
static inline int ksft_is_nommu(void)
{
FILE *fp;
char line[256];
int nommu = 0;
fp = fopen("/proc/meminfo", "r");
if (!fp)
return -1;
while (fgets(line, sizeof(line), fp)) {
if (strncmp(line, "MmapCopy:", sizeof("MmapCopy:") - 1) == 0) {
nommu = 1;
break;
}
}
if (ferror(fp))
nommu = -1;
fclose(fp);
return nommu;
}
#endif
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