linux.kernel - 25 new messages in 10 topics - digest

linux.kernel
http://groups.google.com/group/linux.kernel?hl=en

linux.kernel@googlegroups.com

Today's topics:

* lib: add self-test for atomic64_t - 4 messages, 1 author
http://groups.google.com/group/linux.kernel/t/8b493ddfba63d5b1?hl=en
* x86-32: improve atomic64_t functions (v2) - 1 messages, 1 author
http://groups.google.com/group/linux.kernel/t/ed836659727ddf70?hl=en
* Irish 2010 Grant Winner - 1 messages, 1 author
http://groups.google.com/group/linux.kernel/t/2d968f08f9bd8fa8?hl=en
* cpuset,mm: update tasks' mems_allowed in time (58568d2) - 1 messages, 1
author
http://groups.google.com/group/linux.kernel/t/c97c21f117bf365d?hl=en
* cpuset: Update the cpuset flag file from old name from new name correctly. -
1 messages, 1 author
http://groups.google.com/group/linux.kernel/t/b1c90732e9ca9835?hl=en
* Assorted small patches for regulators - 5 messages, 1 author
http://groups.google.com/group/linux.kernel/t/8f3f33cbcc66f2b6?hl=en
* : input: add support for VirtualBox touchscreen emulation to the Lifebook
driver - 1 messages, 1 author
http://groups.google.com/group/linux.kernel/t/36b703b3286dcd72?hl=en
* KVM: x86: Kick VCPU outside PIC lock again - 6 messages, 2 authors
http://groups.google.com/group/linux.kernel/t/07450b580f5cc563?hl=en
* Regulators: max1586 - annotate probe and remove methods - 4 messages, 2
authors
http://groups.google.com/group/linux.kernel/t/9b85fe4e35c44d4b?hl=en
* winbond-cir: fix suspend/resume - 1 messages, 1 author
http://groups.google.com/group/linux.kernel/t/8d1a23e698d94b8d?hl=en

==============================================================================
TOPIC: lib: add self-test for atomic64_t
http://groups.google.com/group/linux.kernel/t/8b493ddfba63d5b1?hl=en
==============================================================================

== 1 of 4 ==
Date: Wed, Feb 24 2010 2:00 am
From: Luca Barbieri

This patch adds self-test on boot code for atomic64_t.

This has been used to test the later changes in this patchset.

Signed-off-by: Luca Barbieri <luca@luca-barbieri.com>
---
lib/Kconfig.debug | 7 ++
lib/Makefile | 2 +
lib/atomic64_test.c | 158 +++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 167 insertions(+), 0 deletions(-)
create mode 100644 lib/atomic64_test.c

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 25c3ed5..3676c51 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1054,6 +1054,13 @@ config DMA_API_DEBUG
This option causes a performance degredation. Use only if you want
to debug device drivers. If unsure, say N.

+config ATOMIC64_SELFTEST
+ bool "Perform an atomic64_t self-test at boot"
+ help
+ Enable this option to test the atomic64_t functions at boot.
+
+ If unsure, say N.
+
source "samples/Kconfig"

source "lib/Kconfig.kgdb"
diff --git a/lib/Makefile b/lib/Makefile
index 347ad8d..4af4786 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -99,6 +99,8 @@ obj-$(CONFIG_GENERIC_CSUM) += checksum.o

obj-$(CONFIG_GENERIC_ATOMIC64) += atomic64.o

+obj-$(CONFIG_ATOMIC64_SELFTEST) += atomic64_test.o
+
hostprogs-y := gen_crc32table
clean-files := crc32table.h

diff --git a/lib/atomic64_test.c b/lib/atomic64_test.c
new file mode 100644
index 0000000..4ff649e
--- /dev/null
+++ b/lib/atomic64_test.c
@@ -0,0 +1,158 @@
+/*
+ * Testsuite for atomic64_t functions
+ *
+ * Copyright © 2010 Luca Barbieri
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#include <linux/init.h>
+#include <asm/atomic.h>
+
+#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
+static __init int test_atomic64(void)
+{
+ long long v0 = 0xaaa31337c001d00dLL;
+ long long v1 = 0xdeadbeefdeafcafeLL;
+ long long v2 = 0xfaceabadf00df001LL;
+ long long onestwos = 0x1111111122222222LL;
+ long long one = 1LL;
+
+ atomic64_t v = ATOMIC64_INIT(v0);
+ long long r = v0;
+ BUG_ON(v.counter != r);
+
+ atomic64_set(&v, v1);
+ r = v1;
+ BUG_ON(v.counter != r);
+ BUG_ON(atomic64_read(&v) != r);
+
+ INIT(v0);
+ atomic64_add(onestwos, &v);
+ r += onestwos;
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ atomic64_add(-one, &v);
+ r += -one;
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ r += onestwos;
+ BUG_ON(atomic64_add_return(onestwos, &v) != r);
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ r += -one;
+ BUG_ON(atomic64_add_return(-one, &v) != r);
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ atomic64_sub(onestwos, &v);
+ r -= onestwos;
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ atomic64_sub(-one, &v);
+ r -= -one;
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ r -= onestwos;
+ BUG_ON(atomic64_sub_return(onestwos, &v) != r);
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ r -= -one;
+ BUG_ON(atomic64_sub_return(-one, &v) != r);
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ atomic64_inc(&v);
+ r += one;
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ r += one;
+ BUG_ON(atomic64_inc_return(&v) != r);
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ atomic64_dec(&v);
+ r -= one;
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ r -= one;
+ BUG_ON(atomic64_dec_return(&v) != r);
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ BUG_ON(atomic64_xchg(&v, v1) != v0);
+ r = v1;
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
+ r = v1;
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ BUG_ON(!atomic64_add_unless(&v, one, v0));
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ BUG_ON(atomic64_add_unless(&v, one, v1));
+ r += one;
+ BUG_ON(v.counter != r);
+
+ INIT(onestwos);
+ BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
+ r -= one;
+ BUG_ON(v.counter != r);
+
+ INIT(0);
+ BUG_ON(atomic64_dec_if_positive(&v) != -one);
+ BUG_ON(v.counter != r);
+
+ INIT(-one);
+ BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
+ BUG_ON(v.counter != r);
+
+ INIT(onestwos);
+ BUG_ON(atomic64_inc_not_zero(&v));
+ r += one;
+ BUG_ON(v.counter != r);
+
+ INIT(0);
+ BUG_ON(!atomic64_inc_not_zero(&v));
+ BUG_ON(v.counter != r);
+
+ INIT(-one);
+ BUG_ON(atomic64_inc_not_zero(&v));
+ r += one;
+ BUG_ON(v.counter != r);
+
+#ifdef CONFIG_X86
+ printk(KERN_INFO "atomic64 test passed for %s+ platform %s CX8 and %s SSE\n",
+#ifdef CONFIG_X86_CMPXCHG64
+ "586",
+#else
+ "386",
+