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Remove /sys/kernel/realtime check #3303

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Merged
andypugh merged 1 commit into from
Feb 2, 2025
Merged

Remove /sys/kernel/realtime check #3303

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11 changes: 2 additions & 9 deletions src/rtapi/uspace_common.h
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Original file line number Diff line number Diff line change
Expand Up @@ -354,22 +354,15 @@ static int _rtapi_is_realtime = -1;
#ifdef __linux__
static int detect_preempt_rt() {
struct utsname u;
int crit1, crit2 = 0;
FILE *fd;
int crit1 = 0;

uname(&u);
crit1 = strcasestr (u.version, "PREEMPT RT") != 0;

//"PREEMPT_RT" is used in the version string instead of "PREEMPT RT" starting with kernel version 5.4
crit1 = crit1 || (strcasestr(u.version, "PREEMPT_RT") != 0);

if ((fd = fopen("/sys/kernel/realtime","r")) != NULL) {
int flag;
crit2 = ((fscanf(fd, "%d", &flag) == 1) && (flag == 1));
fclose(fd);
}

return crit1 && crit2;
return crit1;
}
#else
static int detect_preempt_rt() {
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