linux-kernel - [PATCH v2] lib/test_bitops: Do the full test during module init

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Message-Id: <20200706112900.7097-1-geert@linux-m68k.org>
Date:   Mon,  6 Jul 2020 13:29:00 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Wei Yang <richard.weiyang@...il.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH v2] lib/test_bitops: Do the full test during module init

Currently, the bitops test consists of two parts: one part is executed
during module load, the second part during module unload. This is
cumbersome for the user, as he has to perform two steps to execute all
tests, and is different from most (all?) other tests.

Merge the two parts, so both are executed during module load.

Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
---
v2:
  - Keep a dummy module_exit() function to support module unloading.
---
 lib/test_bitops.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/lib/test_bitops.c b/lib/test_bitops.c
index ced25e3a779baf96..471141ddd6913724 100644
--- a/lib/test_bitops.c
+++ b/lib/test_bitops.c
@@ -52,9 +52,9 @@ static unsigned long order_comb_long[][2] = {
 
 static int __init test_bitops_startup(void)
 {
-	int i;
+	int i, bit_set;
 
-	pr_warn("Loaded test module\n");
+	pr_info("Starting bitops test\n");
 	set_bit(BITOPS_4, g_bitmap);
 	set_bit(BITOPS_7, g_bitmap);
 	set_bit(BITOPS_11, g_bitmap);
@@ -81,12 +81,8 @@ static int __init test_bitops_startup(void)
 				       order_comb_long[i][0]);
 	}
 #endif
-	return 0;
-}
 
-static void __exit test_bitops_unstartup(void)
-{
-	int bit_set;
+	barrier();
 
 	clear_bit(BITOPS_4, g_bitmap);
 	clear_bit(BITOPS_7, g_bitmap);
@@ -98,7 +94,13 @@ static void __exit test_bitops_unstartup(void)
 	if (bit_set != BITOPS_LAST)
 		pr_err("ERROR: FOUND SET BIT %d\n", bit_set);
 
-	pr_warn("Unloaded test module\n");
+	pr_info("Completed bitops test\n");
+
+	return 0;
+}
+
+static void __exit test_bitops_unstartup(void)
+{
 }
 
 module_init(test_bitops_startup);
-- 
2.17.1