#include <stdbool.h>
#include <stdlib.h>
#include "tests.h"
#include "dso.h"
#include "debug.h"

static int test(const char *path, bool alloc_name, bool alloc_ext,
		bool kmod, bool comp, const char *name, const char *ext)
{
	struct kmod_path m;

	memset(&m, 0x0, sizeof(m));

	TEST_ASSERT_VAL("kmod_path__parse",
			!__kmod_path__parse(&m, path, alloc_name, alloc_ext));

	pr_debug("%s - alloc name %d, alloc ext %d, kmod %d, comp %d, name '%s', ext '%s'\n",
		 path, alloc_name, alloc_ext, m.kmod, m.comp, m.name, m.ext);

	TEST_ASSERT_VAL("wrong kmod", m.kmod == kmod);
	TEST_ASSERT_VAL("wrong comp", m.comp == comp);

	if (ext)
		TEST_ASSERT_VAL("wrong ext", m.ext && !strcmp(ext, m.ext));
	else
		TEST_ASSERT_VAL("wrong ext", !m.ext);

	if (name)
		TEST_ASSERT_VAL("wrong name", m.name && !strcmp(name, m.name));
	else
		TEST_ASSERT_VAL("wrong name", !m.name);

	free(m.name);
	free(m.ext);
	return 0;
}

static int test_is_kernel_module(const char *path, int cpumode, bool expect)
{
	TEST_ASSERT_VAL("is_kernel_module",
			(!!is_kernel_module(path, cpumode)) == (!!expect));
	pr_debug("%s (cpumode: %d) - is_kernel_module: %s\n",
			path, cpumode, expect ? "true" : "false");
	return 0;
}

#define T(path, an, ae, k, c, n, e) \
	TEST_ASSERT_VAL("failed", !test(path, an, ae, k, c, n, e))

#define M(path, c, e) \
	TEST_ASSERT_VAL("failed", !test_is_kernel_module(path, c, e))

int test__kmod_path__parse(int subtest __maybe_unused)
{
	/* path                alloc_name  alloc_ext   kmod  comp   name     ext */
	T("/xxxx/xxxx/x-x.ko", true      , true      , true, false, "[x_x]", NULL);
	T("/xxxx/xxxx/x-x.ko", false     , true      , true, false, NULL   , NULL);
	T("/xxxx/xxxx/x-x.ko", true      , false     , true, false, "[x_x]", NULL);
	T("/xxxx/xxxx/x-x.ko", false     , false     , true, false, NULL   , NULL);
	M("/xxxx/xxxx/x-x.ko", PERF_RECORD_MISC_CPUMODE_UNKNOWN, true);
	M("/xxxx/xxxx/x-x.ko", PERF_RECORD_MISC_KERNEL, true);
	M("/xxxx/xxxx/x-x.ko", PERF_RECORD_MISC_USER, false);

	/* path                alloc_name  alloc_ext   kmod  comp  name   ext */
	T("/xxxx/xxxx/x.ko.gz", true     , true      , true, true, "[x]", "gz");
	T("/xxxx/xxxx/x.ko.gz", false    , true      , true, true, NULL , "gz");
	T("/xxxx/xxxx/x.ko.gz", true     , false     , true, true, "[x]", NULL);
	T("/xxxx/xxxx/x.ko.gz", false    , false     , true, true, NULL , NULL);
	M("/xxxx/xxxx/x.ko.gz", PERF_RECORD_MISC_CPUMODE_UNKNOWN, true);
	M("/xxxx/xxxx/x.ko.gz", PERF_RECORD_MISC_KERNEL, true);
	M("/xxxx/xxxx/x.ko.gz", PERF_RECORD_MISC_USER, false);

	/* path              alloc_name  alloc_ext  kmod   comp  name    ext */
	T("/xxxx/xxxx/x.gz", true      , true     , false, true, "x.gz" ,"gz");
	T("/xxxx/xxxx/x.gz", false     , true     , false, true, NULL   ,"gz");
	T("/xxxx/xxxx/x.gz", true      , false    , false, true, "x.gz" , NULL);
	T("/xxxx/xxxx/x.gz", false     , false    , false, true, NULL   , NULL);
	M("/xxxx/xxxx/x.gz", PERF_RECORD_MISC_CPUMODE_UNKNOWN, false);
	M("/xxxx/xxxx/x.gz", PERF_RECORD_MISC_KERNEL, false);
	M("/xxxx/xxxx/x.gz", PERF_RECORD_MISC_USER, false);

	/* path   alloc_name  alloc_ext  kmod   comp  name     ext */
	T("x.gz", true      , true     , false, true, "x.gz", "gz");
	T("x.gz", false     , true     , false, true, NULL  , "gz");
	T("x.gz", true      , false    , false, true, "x.gz", NULL);
	T("x.gz", false     , false    , false, true, NULL  , NULL);
	M("x.gz", PERF_RECORD_MISC_CPUMODE_UNKNOWN, false);
	M("x.gz", PERF_RECORD_MISC_KERNEL, false);
	M("x.gz", PERF_RECORD_MISC_USER, false);

	/* path      alloc_name  alloc_ext  kmod  comp  name  ext */
	T("x.ko.gz", true      , true     , true, true, "[x]", "gz");
	T("x.ko.gz", false     , true     , true, true, NULL , "gz");
	T("x.ko.gz", true      , false    , true, true, "[x]", NULL);
	T("x.ko.gz", false     , false    , true, true, NULL , NULL);
	M("x.ko.gz", PERF_RECORD_MISC_CPUMODE_UNKNOWN, true);
	M("x.ko.gz", PERF_RECORD_MISC_KERNEL, true);
	M("x.ko.gz", PERF_RECORD_MISC_USER, false);

	/* path            alloc_name  alloc_ext  kmod  comp   name             ext */
	T("[test_module]", true      , true     , true, false, "[test_module]", NULL);
	T("[test_module]", false     , true     , true, false, NULL           , NULL);
	T("[test_module]", true      , false    , true, false, "[test_module]", NULL);
	T("[test_module]", false     , false    , true, false, NULL           , NULL);
	M("[test_module]", PERF_RECORD_MISC_CPUMODE_UNKNOWN, true);
	M("[test_module]", PERF_RECORD_MISC_KERNEL, true);
	M("[test_module]", PERF_RECORD_MISC_USER, false);

	/* path            alloc_name  alloc_ext  kmod  comp   name             ext */
	T("[test.module]", true      , true     , true, false, "[test.module]", NULL);
	T("[test.module]", false     , true     , true, false, NULL           , NULL);
	T("[test.module]", true      , false    , true, false, "[test.module]", NULL);
	T("[test.module]", false     , false    , true, false, NULL           , NULL);
	M("[test.module]", PERF_RECORD_MISC_CPUMODE_UNKNOWN, true);
	M("[test.module]", PERF_RECORD_MISC_KERNEL, true);
	M("[test.module]", PERF_RECORD_MISC_USER, false);

	/* path     alloc_name  alloc_ext  kmod   comp   name      ext */
	T("[vdso]", true      , true     , false, false, "[vdso]", NULL);
	T("[vdso]", false     , true     , false, false, NULL    , NULL);
	T("[vdso]", true      , false    , false, false, "[vdso]", NULL);
	T("[vdso]", false     , false    , false, false, NULL    , NULL);
	M("[vdso]", PERF_RECORD_MISC_CPUMODE_UNKNOWN, false);
	M("[vdso]", PERF_RECORD_MISC_KERNEL, false);
	M("[vdso]", PERF_RECORD_MISC_USER, false);

	/* path         alloc_name  alloc_ext  kmod   comp   name          ext */
	T("[vsyscall]", true      , true     , false, false, "[vsyscall]", NULL);
	T("[vsyscall]", false     , true     , false, false, NULL        , NULL);
	T("[vsyscall]", true      , false    , false, false, "[vsyscall]", NULL);
	T("[vsyscall]", false     , false    , false, false, NULL        , NULL);
	M("[vsyscall]", PERF_RECORD_MISC_CPUMODE_UNKNOWN, false);
	M("[vsyscall]", PERF_RECORD_MISC_KERNEL, false);
	M("[vsyscall]", PERF_RECORD_MISC_USER, false);

	/* path                alloc_name  alloc_ext  kmod   comp   name      ext */
	T("[kernel.kallsyms]", true      , true     , false, false, "[kernel.kallsyms]", NULL);
	T("[kernel.kallsyms]", false     , true     , false, false, NULL               , NULL);
	T("[kernel.kallsyms]", true      , false    , false, false, "[kernel.kallsyms]", NULL);
	T("[kernel.kallsyms]", false     , false    , false, false, NULL               , NULL);
	M("[kernel.kallsyms]", PERF_RECORD_MISC_CPUMODE_UNKNOWN, false);
	M("[kernel.kallsyms]", PERF_RECORD_MISC_KERNEL, false);
	M("[kernel.kallsyms]", PERF_RECORD_MISC_USER, false);

	return 0;
}
he user modifies the migration thread's affinity, it will not
change after that happens.

The original code created the thread at the first instance it was called,
but later was changed to destroy the thread after the tracer was finished,
and would not be created until the next instance of the tracer was
established. The code that initialized the affinity was only called on the
initial instantiation of the tracer. After that, it was not initialized, and
the previous affinity did not match the current newly created one, making
it appear that the user modified the thread's affinity when it did not, and
the thread failed to migrate again.

Cc: stable@vger.kernel.org
Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs")
Signed-off-by: Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>Diffstat</a> (limited to 'sound/usb/usx2y/us122l.c')</div><table summary='diffstat' class='diffstat'>