1 files changed, 64 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches/0213-sdio-use-interruptible-sleep-in-kthread-main-loops.patch b/target/linux/s3c24xx/patches/0213-sdio-use-interruptible-sleep-in-kthread-main-loops.patch
new file mode 100755
index 0000000000..e68c058109
--- /dev/null
+++ b/target/linux/s3c24xx/patches/0213-sdio-use-interruptible-sleep-in-kthread-main-loops.patch
@@ -0,0 +1,64 @@
+From cba59b243d542f3de9c534d99b2f3f33e50b3ebb Mon Sep 17 00:00:00 2001
+From: Jason Uhlenkott <jasonuhl@jasonuhl.org>
+Date: Fri, 25 Jul 2008 23:06:20 +0100
+Subject: [PATCH] sdio: use interruptible sleep in kthread main loops
+
+My FreeRunner's load average was leveling off at 2.00 as a result of
+these two kernel threads:
+
+SDIO Helper   D c02b4500     0   255      2
+[<c02b4298>] (schedule+0x0/0x2d4) from [<c02b4040>] (__down+0x100/0x158)
+[<c02b3f40>] (__down+0x0/0x158) from [<c02b3e2c>] (__down_failed+0xc/0x20)
+ r7:00000000 r6:c01fbd64 r5:c7cb7134 r4:c7d58000
+[<c01fa6fc>] (CardDetectHelperFunction+0x0/0x1ac) from [<c01fbd80>] (HelperLaunch+0x1c/0x28)
+ r5:c7cb7134 r4:c7cb7134
+[<c01fbd64>] (HelperLaunch+0x0/0x28) from [<c005bbd0>] (kthread+0x60/0x94)
+ r4:c7d58000
+[<c005bb70>] (kthread+0x0/0x94) from [<c0048f7c>] (do_exit+0x0/0x744)
+ r6:00000000 r5:00000000 r4:00000000
+
+SDIO Helper   D c02b4500     0   259      2
+[<c02b4298>] (schedule+0x0/0x2d4) from [<c02b4040>] (__down+0x100/0x158)
+[<c02b3f40>] (__down+0x0/0x158) from [<c02b3e2c>] (__down_failed+0xc/0x20)
+ r7:c0382bb4 r6:c0382b34 r5:c7d5a000 r4:00000001
+[<c01f9104>] (SDIOIrqHelperFunction+0x0/0x29c) from [<c01fbd80>] (HelperLaunch+0x1c/0x28)
+ r8:00000000 r7:00000000 r6:c01fbd64 r5:c0382bb4 r4:c0382bb4
+[<c01fbd64>] (HelperLaunch+0x0/0x28) from [<c005bbd0>] (kthread+0x60/0x94)
+ r4:c7d5a000
+[<c005bb70>] (kthread+0x0/0x94) from [<c0048f7c>] (do_exit+0x0/0x744)
+ r6:00000000 r5:00000000 r4:00000000
+
+This fixes them to use interruptible sleep primitives while waiting in
+their main loops, as is conventional for kernel threads.  They can't
+actually be interrupted since kernel threads ignore all signals, but
+by sleeping this way they get classified as long term waiters, and
+don't get counted as running for purposes of load average calculation.
+
+This is intended as a minimal fix.  In the longer term, it'd probably
+make sense to replace the semaphores with completions or something,
+and to do away with some of these StudlyCapped wrapper functions.
+
+Signed-off-by: Jason Uhlenkott <jasonuhl@jasonuhl.org>
+--
+
+This is untested, but what could possibly go wrong?  ;)
+---
+ include/linux/sdio/ctsystem_linux.h |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+diff --git a/include/linux/sdio/ctsystem_linux.h b/include/linux/sdio/ctsystem_linux.h
+index 0de89a6..c9e44f2 100644
+--- a/include/linux/sdio/ctsystem_linux.h
++++ b/include/linux/sdio/ctsystem_linux.h
+@@ -968,7 +968,7 @@ typedef struct _OSKERNEL_HELPER {
+         }
+ 
+ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+-#define SD_WAIT_FOR_WAKEUP(p)   SignalWait(&(p)->WakeSignal);
++#define SD_WAIT_FOR_WAKEUP(p)   SignalWaitInterruptible(&(p)->WakeSignal);
+ 
+ #define CT_LE16_TO_CPU_ENDIAN(x) __le16_to_cpu(x)
+ #define CT_LE32_TO_CPU_ENDIAN(x) __le32_to_cpu(x)
+-- 
+1.5.6.3
+