This backports:
commit 63b2001169e75cd71e917ec953fdab572e3f944a
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Date: Thu Dec 1 00:04:00 2011 +0100
sched/wait: Add __wake_up_all_locked() API
$ git describe --contains 63b2001169e75cd71e917ec953fdab572e3f944a
v3.4-rc1~3^2~24
This is used by the 3.6-rcX radeon DRM driver (radeon_sa.c) and will
probably be used by other drivers in the near future.
__wake_up_all_locked() is a preprocessor macro around __wake_up_locked()
which gained a 3rd parameter in 3.4.
That's why I backported the new __wake_up_locked() as
compat_wake_up_locked() to avoid name conflicts.
This new function uses the internal __wake_up_common() function
which needed a backport too. I backported it as
compat_wake_up_common() as __wake_up_common() was made available
in kernels between 2.6.28 <= x <= 2.6.30 through wait.h and
dropped after 2.6.30. Renaming fixes build problems of compat
for those kernels.
Trying kernel 3.5.0-030500-generic [OK]
Trying kernel 3.4.4-030404-generic [OK]
Trying kernel 3.3.7-030307-generic [OK]
Trying kernel 3.2.2-030202-generic [OK]
Trying kernel 3.1.10-030110-generic [OK]
Trying kernel 3.0.18-030018-generic [OK]
Trying kernel 2.6.39-02063904-generic [OK]
Trying kernel 2.6.38-02063808-generic [OK]
Trying kernel 2.6.37-02063706-generic [OK]
Trying kernel 2.6.36-02063604-generic [OK]
Trying kernel 2.6.35-02063512-generic [OK]
Trying kernel 2.6.34-02063410-generic [OK]
Trying kernel 2.6.33-02063305-generic [OK]
Trying kernel 2.6.32-02063255-generic [OK]
Trying kernel 2.6.31-02063113-generic [OK]
Trying kernel 2.6.30-02063010-generic [OK]
Trying kernel 2.6.29-02062906-generic [OK]
Trying kernel 2.6.28-02062810-generic [OK]
Trying kernel 2.6.27-020627-generic [OK]
Trying kernel 2.6.26-020626-generic [OK]
Trying kernel 2.6.25-020625-generic [OK]
Trying kernel 2.6.24-020624-generic [OK]
Signed-off-by: Ozan Çağlayan <ozancag@xxxxxxxxx>
---
compat/compat-3.4.c | 29 +++++++++++++++++++++++++++++
include/linux/compat-3.4.h | 13 +++++++++++++
2 files changed, 42 insertions(+)
diff --git a/compat/compat-3.4.c b/compat/compat-3.4.c
index 4ff439b..a771260 100644
--- a/compat/compat-3.4.c
+++ b/compat/compat-3.4.c
@@ -10,6 +10,35 @@
#include <linux/fs.h>
#include <linux/module.h>
+#include <linux/wait.h>
+
+/* __wake_up_common was declared as part of the wait.h until
+ * 2.6.31 in which they made it private to the scheduler. Prefix it with
+ * compat to avoid double declaration issues.
+ */
+static void compat_wake_up_common(wait_queue_head_t *q, unsigned int mode,
+ int nr_exclusive, int wake_flags, void *key)
+{
+ wait_queue_t *curr, *next;
+
+ list_for_each_entry_safe(curr, next, &q->task_list, task_list) {
+ unsigned flags = curr->flags;
+
+ if (curr->func(curr, mode, wake_flags, key) &&
+ (flags & WQ_FLAG_EXCLUSIVE) && !--nr_exclusive)
+ break;
+ }
+}
+
+/* The last 'nr' parameter was added to the __wake_up_locked() function
+ * in 3.4 kernel. Define a new one prefixed with compat_ for the new API.
+ */
+void compat_wake_up_locked(wait_queue_head_t *q, unsigned int mode, int nr)
+{
+ compat_wake_up_common(q, mode, nr, 0, NULL);
+}
+EXPORT_SYMBOL_GPL(compat_wake_up_locked);
+
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,34))
#include <linux/i2c.h>
diff --git a/include/linux/compat-3.4.h b/include/linux/compat-3.4.h
index 06a3a07..07bfa53 100644
--- a/include/linux/compat-3.4.h
+++ b/include/linux/compat-3.4.h
@@ -5,6 +5,19 @@
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0))
+
+/* This backports:
+ *
+ * commit 63b2001169e75cd71e917ec953fdab572e3f944a
+ * Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
+ * Date: Thu Dec 1 00:04:00 2011 +0100
+
+ * sched/wait: Add __wake_up_all_locked() API
+ */
+#include <linux/wait.h>
+extern void compat_wake_up_locked(wait_queue_head_t *q, unsigned int mode, int nr);
+#define wake_up_all_locked(x) compat_wake_up_locked((x), TASK_NORMAL, 0)
+
/* This backports:
*
* commit a8203725dfded5c1f79dca3368a4a273e24b59bb
--
1.7.11.2
--
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