Merge tag 'linux_kselftest-next-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest updates from Shuah Khan:

 - kbuild kselftest-merge target fixes

 - fixes to several tests

 - resctrl test fixes and enhancements

 - ksft_perror() helper and reporting improvements

 - printf attribute to kselftest prints to improve reporting

 - documentation and clang build warning fixes

The bulk of the patches are for resctrl fixes and enhancements.

* tag 'linux_kselftest-next-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (51 commits)
  selftests/resctrl: Fix MBM test failure when MBA unavailable
  selftests/clone3: Report descriptive test names
  selftests:modify the incorrect print format
  selftests/efivarfs: create-read: fix a resource leak
  selftests/ftrace: Add riscv support for kprobe arg tests
  selftests/ftrace: add loongarch support for kprobe args char tests
  selftests/amd-pstate: Added option to provide perf binary path
  selftests/amd-pstate: Fix broken paths to run workloads in amd-pstate-ut
  selftests/resctrl: Move run_benchmark() to a more fitting file
  selftests/resctrl: Fix schemata write error check
  selftests/resctrl: Reduce failures due to outliers in MBA/MBM tests
  selftests/resctrl: Fix feature checks
  selftests/resctrl: Refactor feature check to use resource and feature name
  selftests/resctrl: Move _GNU_SOURCE define into Makefile
  selftests/resctrl: Remove duplicate feature check from CMT test
  selftests/resctrl: Extend signal handler coverage to unmount on receiving signal
  selftests/resctrl: Fix uninitialized .sa_flags
  selftests/resctrl: Cleanup benchmark argument parsing
  selftests/resctrl: Remove ben_count variable
  selftests/resctrl: Make benchmark command const and build it with pointers
  ...

1 files changed, 7 insertions, 14 deletions

diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c
index 3848dfb46aba..224ba8544d8a 100644
--- a/tools/testing/selftests/resctrl/cat_test.c
+++ b/tools/testing/selftests/resctrl/cat_test.c
@@ -41,7 +41,7 @@ static int cat_setup(struct resctrl_val_param *p)
 	return ret;
 }
 
-static int check_results(struct resctrl_val_param *param)
+static int check_results(struct resctrl_val_param *param, size_t span)
 {
 	char *token_array[8], temp[512];
 	unsigned long sum_llc_perf_miss = 0;
@@ -76,7 +76,7 @@ static int check_results(struct resctrl_val_param *param)
 	fclose(fp);
 	no_of_bits = count_bits(param->mask);
 
-	return show_cache_info(sum_llc_perf_miss, no_of_bits, param->span / 64,
+	return show_cache_info(sum_llc_perf_miss, no_of_bits, span / 64,
 			       MAX_DIFF, MAX_DIFF_PERCENT, runs - 1,
 			       get_vendor() == ARCH_INTEL, false);
 }
@@ -96,6 +96,7 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type)
 	char cbm_mask[256];
 	int count_of_bits;
 	char pipe_message;
+	size_t span;
 
 	/* Get default cbm mask for L3/L2 cache */
 	ret = get_cbm_mask(cache_type, cbm_mask);
@@ -140,7 +141,7 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type)
 	/* Set param values for parent thread which will be allocated bitmask
 	 * with (max_bits - n) bits
 	 */
-	param.span = cache_size * (count_of_bits - n) / count_of_bits;
+	span = cache_size * (count_of_bits - n) / count_of_bits;
 	strcpy(param.ctrlgrp, "c2");
 	strcpy(param.mongrp, "m2");
 	strcpy(param.filename, RESULT_FILE_NAME2);
@@ -162,23 +163,17 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type)
 		param.mask = l_mask_1;
 		strcpy(param.ctrlgrp, "c1");
 		strcpy(param.mongrp, "m1");
-		param.span = cache_size * n / count_of_bits;
+		span = cache_size * n / count_of_bits;
 		strcpy(param.filename, RESULT_FILE_NAME1);
 		param.num_of_runs = 0;
 		param.cpu_no = sibling_cpu_no;
-	} else {
-		ret = signal_handler_register();
-		if (ret) {
-			kill(bm_pid, SIGKILL);
-			goto out;
-		}
 	}
 
 	remove(param.filename);
 
-	ret = cat_val(&param);
+	ret = cat_val(&param, span);
 	if (ret == 0)
-		ret = check_results(&param);
+		ret = check_results(&param, span);
 
 	if (bm_pid == 0) {
 		/* Tell parent that child is ready */
@@ -208,10 +203,8 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type)
 		}
 		close(pipefd[0]);
 		kill(bm_pid, SIGKILL);
-		signal_handler_unregister();
 	}
 
-out:
 	cat_test_cleanup();
 
 	return ret;