Merge tag '5.11-rc-smb3' of git://git.samba.org/sfrench/cifs-2.6

[linux-2.6-microblaze.git] / lib / locking-selftest.c

diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index 4c24ac8..9959ea2 100644 (file)
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -15,6 +15,7 @@
 #include <linux/mutex.h>
 #include <linux/ww_mutex.h>
 #include <linux/sched.h>
+#include <linux/sched/mm.h>
 #include <linux/delay.h>
 #include <linux/lockdep.h>
 #include <linux/spinlock.h>
@@ -2374,6 +2375,50 @@ static void queued_read_lock_tests(void)
        pr_cont("\n");
 }
 
+static void fs_reclaim_correct_nesting(void)
+{
+       fs_reclaim_acquire(GFP_KERNEL);
+       might_alloc(GFP_NOFS);
+       fs_reclaim_release(GFP_KERNEL);
+}
+
+static void fs_reclaim_wrong_nesting(void)
+{
+       fs_reclaim_acquire(GFP_KERNEL);
+       might_alloc(GFP_KERNEL);
+       fs_reclaim_release(GFP_KERNEL);
+}
+
+static void fs_reclaim_protected_nesting(void)
+{
+       unsigned int flags;
+
+       fs_reclaim_acquire(GFP_KERNEL);
+       flags = memalloc_nofs_save();
+       might_alloc(GFP_KERNEL);
+       memalloc_nofs_restore(flags);
+       fs_reclaim_release(GFP_KERNEL);
+}
+
+static void fs_reclaim_tests(void)
+{
+       printk("  --------------------\n");
+       printk("  | fs_reclaim tests |\n");
+       printk("  --------------------\n");
+
+       print_testname("correct nesting");
+       dotest(fs_reclaim_correct_nesting, SUCCESS, 0);
+       pr_cont("\n");
+
+       print_testname("wrong nesting");
+       dotest(fs_reclaim_wrong_nesting, FAILURE, 0);
+       pr_cont("\n");
+
+       print_testname("protected nesting");
+       dotest(fs_reclaim_protected_nesting, SUCCESS, 0);
+       pr_cont("\n");
+}
+
 void locking_selftest(void)
 {
        /*
@@ -2495,6 +2540,8 @@ void locking_selftest(void)
        if (IS_ENABLED(CONFIG_QUEUED_RWLOCKS))
                queued_read_lock_tests();
 
+       fs_reclaim_tests();
+
        if (unexpected_testcase_failures) {
                printk("-----------------------------------------------------------------\n");
                debug_locks = 0;