[PATCH v3 4/4] KVM: selftests: Drop unused sysfs NUMA helpers

[Shivank Garg]

No users of get_max_numa_node(), is_numa_available(), or
is_multi_numa_node_system() remain.  Remove the helpers and the now
unused dirent.h include.

Signed-off-by: Shivank Garg <shivankg@xxxxxxx>
---
 tools/testing/selftests/kvm/include/numaif.h | 52 ----------------------------
 1 file changed, 52 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/numaif.h b/tools/testing/selftests/kvm/include/numaif.h
index 0945500c6322..c3884017ebb8 100644
--- a/tools/testing/selftests/kvm/include/numaif.h
+++ b/tools/testing/selftests/kvm/include/numaif.h
@@ -4,8 +4,6 @@
 #ifndef SELFTEST_KVM_NUMAIF_H
 #define SELFTEST_KVM_NUMAIF_H
 
-#include <dirent.h>
-
 #include <linux/bitmap.h>
 #include <linux/mempolicy.h>
 
@@ -73,54 +71,4 @@ static inline int kvm_get_next_numa_node(unsigned long nodemask, int from)
 	return to;
 }
 
-static inline int get_max_numa_node(void)
-{
-	struct dirent *de;
-	int max_node = 0;
-	DIR *d;
-
-	/*
-	 * Assume there's a single node if the kernel doesn't support NUMA,
-	 * or if no nodes are found.
-	 */
-	d = opendir("/sys/devices/system/node");
-	if (!d)
-		return 0;
-
-	while ((de = readdir(d)) != NULL) {
-		int node_id;
-		char *endptr;
-
-		if (strncmp(de->d_name, "node", 4) != 0)
-			continue;
-
-		node_id = strtol(de->d_name + 4, &endptr, 10);
-		if (*endptr != '\0')
-			continue;
-
-		if (node_id > max_node)
-			max_node = node_id;
-	}
-	closedir(d);
-
-	return max_node;
-}
-
-static bool is_numa_available(void)
-{
-	/*
-	 * Probe for NUMA by doing a dummy get_mempolicy().  If the syscall
-	 * fails with ENOSYS, then the kernel was built without NUMA support.
-	 * if the syscall fails with EPERM, then the process/user lacks the
-	 * necessary capabilities (CAP_SYS_NICE).
-	 */
-	return !get_mempolicy(NULL, NULL, 0, NULL, 0) ||
-		(errno != ENOSYS && errno != EPERM);
-}
-
-static inline bool is_multi_numa_node_system(void)
-{
-	return is_numa_available() && get_max_numa_node() >= 1;
-}
-
 #endif /* SELFTEST_KVM_NUMAIF_H */

-- 
2.43.0