X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=ndk%2Fandroid-ndk-r4%2Flinux%2Fplatforms%2Fandroid-8%2Farch-arm%2Fusr%2Finclude%2Flinux%2Fblockgroup_lock.h;fp=ndk%2Fandroid-ndk-r4%2Flinux%2Fplatforms%2Fandroid-8%2Farch-arm%2Fusr%2Finclude%2Flinux%2Fblockgroup_lock.h;h=c814020526e58ca9930a49ce5a57ce543372079c;hb=72eddb87bfc38a2f6fae40566ec6380eb838489a;hp=0000000000000000000000000000000000000000;hpb=e19e12d257815bef7bfe4f3d81056a5b2464c464;p=android-x86%2Fprebuilt.git

diff --git a/ndk/android-ndk-r4/linux/platforms/android-8/arch-arm/usr/include/linux/blockgroup_lock.h b/ndk/android-ndk-r4/linux/platforms/android-8/arch-arm/usr/include/linux/blockgroup_lock.h
new file mode 100644
index 0000000..c814020
--- /dev/null
+++ b/ndk/android-ndk-r4/linux/platforms/android-8/arch-arm/usr/include/linux/blockgroup_lock.h
@@ -0,0 +1,29 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _LINUX_BLOCKGROUP_LOCK_H
+#define _LINUX_BLOCKGROUP_LOCK_H
+
+#include <linux/spinlock.h>
+#include <linux/cache.h>
+
+#define NR_BG_LOCKS 1
+
+struct bgl_lock {
+ spinlock_t lock;
+} ____cacheline_aligned_in_smp;
+
+struct blockgroup_lock {
+ struct bgl_lock locks[NR_BG_LOCKS];
+};
+
+#define sb_bgl_lock(sb, block_group)   (&(sb)->s_blockgroup_lock.locks[(block_group) & (NR_BG_LOCKS-1)].lock)
+#endif