Merge tag 'linux_kselftest-next-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest updates from Shuah Khan:

 - change resctrl test to cleanup resctrl_val() and generalize it by
   removing test name specific handling from the function.

 - several clang build failure fixes to framework and tests

 - add tests to verify IFS (In Field Scan) driver functionality

 - cleanups to remove unused variables and document changes

* tag 'linux_kselftest-next-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (33 commits)
  selftests: ifs: verify IFS ARRAY BIST functionality
  selftests: ifs: verify IFS scan test functionality
  selftests: ifs: verify test image loading functionality
  selftests: ifs: verify test interfaces are created by the driver
  selftests/dma:remove unused variable
  selftests/breakpoints:Remove unused variable
  selftests/x86: fix printk warnings reported by clang
  selftests/x86: remove (or use) unused variables and functions
  selftests/x86: avoid -no-pie warnings from clang during compilation
  selftests/x86: build sysret_rip.c with clang
  selftests/x86: build fsgsbase_restore.c with clang
  selftests: x86: test_FISTTP: use fisttps instead of ambiguous fisttp
  selftests/x86: fix Makefile dependencies to work with clang
  selftests/timers: remove unused irqcount variable
  selftests: Add information about TAP conformance in tests
  selftests/resctrl: Remove test name comparing from write_bm_pid_to_resctrl()
  selftests/resctrl: Remove mongrp from CMT test
  selftests/resctrl: Remove mongrp from MBA test
  selftests/resctrl: Convert ctrlgrp & mongrp to pointers
  selftests/resctrl: Make some strings passed to resctrlfs functions const
  ...

1 files changed, 30 insertions, 37 deletions

diff --git a/tools/testing/selftests/resctrl/resctrlfs.c b/tools/testing/selftests/resctrl/resctrlfs.c
index 1cade75176eb..250c320349a7 100644
--- a/tools/testing/selftests/resctrl/resctrlfs.c
+++ b/tools/testing/selftests/resctrl/resctrlfs.c
@@ -456,6 +456,9 @@ int taskset_restore(pid_t bm_pid, cpu_set_t *old_affinity)
  * @grp:	Full path and name of the group
  * @parent_grp:	Full path and name of the parent group
  *
+ * Creates a group @grp_name if it does not exist yet. If @grp_name is NULL,
+ * it is interpreted as the root group which always results in success.
+ *
  * Return: 0 on success, < 0 on error.
  */
 static int create_grp(const char *grp_name, char *grp, const char *parent_grp)
@@ -464,12 +467,7 @@ static int create_grp(const char *grp_name, char *grp, const char *parent_grp)
 	struct dirent *ep;
 	DIR *dp;
 
-	/*
-	 * At this point, we are guaranteed to have resctrl FS mounted and if
-	 * length of grp_name == 0, it means, user wants to use root con_mon
-	 * grp, so do nothing
-	 */
-	if (strlen(grp_name) == 0)
+	if (!grp_name)
 		return 0;
 
 	/* Check if requested grp exists or not */
@@ -508,7 +506,7 @@ static int write_pid_to_tasks(char *tasks, pid_t pid)
 
 		return -1;
 	}
-	if (fprintf(fp, "%d\n", pid) < 0) {
+	if (fprintf(fp, "%d\n", (int)pid) < 0) {
 		ksft_print_msg("Failed to write pid to tasks file\n");
 		fclose(fp);
 
@@ -524,7 +522,6 @@ static int write_pid_to_tasks(char *tasks, pid_t pid)
  * @bm_pid:		PID that should be written
  * @ctrlgrp:		Name of the control monitor group (con_mon grp)
  * @mongrp:		Name of the monitor group (mon grp)
- * @resctrl_val:	Resctrl feature (Eg: mbm, mba.. etc)
  *
  * If a con_mon grp is requested, create it and write pid to it, otherwise
  * write pid to root con_mon grp.
@@ -534,14 +531,13 @@ static int write_pid_to_tasks(char *tasks, pid_t pid)
  *
  * Return: 0 on success, < 0 on error.
  */
-int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
-			    char *resctrl_val)
+int write_bm_pid_to_resctrl(pid_t bm_pid, const char *ctrlgrp, const char *mongrp)
 {
 	char controlgroup[128], monitorgroup[512], monitorgroup_p[256];
 	char tasks[1024];
 	int ret = 0;
 
-	if (strlen(ctrlgrp))
+	if (ctrlgrp)
 		sprintf(controlgroup, "%s/%s", RESCTRL_PATH, ctrlgrp);
 	else
 		sprintf(controlgroup, "%s", RESCTRL_PATH);
@@ -555,22 +551,19 @@ int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
 	if (ret)
 		goto out;
 
-	/* Create mon grp and write pid into it for "mbm" and "cmt" test */
-	if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)) ||
-	    !strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR))) {
-		if (strlen(mongrp)) {
-			sprintf(monitorgroup_p, "%s/mon_groups", controlgroup);
-			sprintf(monitorgroup, "%s/%s", monitorgroup_p, mongrp);
-			ret = create_grp(mongrp, monitorgroup, monitorgroup_p);
-			if (ret)
-				goto out;
-
-			sprintf(tasks, "%s/mon_groups/%s/tasks",
-				controlgroup, mongrp);
-			ret = write_pid_to_tasks(tasks, bm_pid);
-			if (ret)
-				goto out;
-		}
+	/* Create monitor group and write pid into if it is used */
+	if (mongrp) {
+		sprintf(monitorgroup_p, "%s/mon_groups", controlgroup);
+		sprintf(monitorgroup, "%s/%s", monitorgroup_p, mongrp);
+		ret = create_grp(mongrp, monitorgroup, monitorgroup_p);
+		if (ret)
+			goto out;
+
+		sprintf(tasks, "%s/mon_groups/%s/tasks",
+			controlgroup, mongrp);
+		ret = write_pid_to_tasks(tasks, bm_pid);
+		if (ret)
+			goto out;
 	}
 
 out:
@@ -593,7 +586,8 @@ out:
  *
  * Return: 0 on success, < 0 on error.
  */
-int write_schemata(char *ctrlgrp, char *schemata, int cpu_no, const char *resource)
+int write_schemata(const char *ctrlgrp, char *schemata, int cpu_no,
+		   const char *resource)
 {
 	char controlgroup[1024], reason[128], schema[1024] = {};
 	int domain_id, fd, schema_len, ret = 0;
@@ -611,7 +605,7 @@ int write_schemata(char *ctrlgrp, char *schemata, int cpu_no, const char *resour
 		goto out;
 	}
 
-	if (strlen(ctrlgrp) != 0)
+	if (ctrlgrp)
 		sprintf(controlgroup, "%s/%s/schemata", RESCTRL_PATH, ctrlgrp);
 	else
 		sprintf(controlgroup, "%s/schemata", RESCTRL_PATH);
@@ -837,22 +831,21 @@ int filter_dmesg(void)
 	return 0;
 }
 
-int validate_bw_report_request(char *bw_report)
+const char *get_bw_report_type(const char *bw_report)
 {
 	if (strcmp(bw_report, "reads") == 0)
-		return 0;
+		return bw_report;
 	if (strcmp(bw_report, "writes") == 0)
-		return 0;
+		return bw_report;
 	if (strcmp(bw_report, "nt-writes") == 0) {
-		strcpy(bw_report, "writes");
-		return 0;
+		return "writes";
 	}
 	if (strcmp(bw_report, "total") == 0)
-		return 0;
+		return bw_report;
 
-	fprintf(stderr, "Requested iMC B/W report type unavailable\n");
+	fprintf(stderr, "Requested iMC bandwidth report type unavailable\n");
 
-	return -1;
+	return NULL;
 }
 
 int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu,