patch-2.2.18 linux/arch/arm/lib/semaphore.S

• Lines: 35
• Date: Fri Sep 15 23:28:37 2000
• Orig file: v2.2.17/arch/arm/lib/semaphore.S
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/arch/arm/lib/semaphore.S linux/arch/arm/lib/semaphore.S
@@ -0,0 +1,34 @@
+/*
+ *  linux/arch/arm/lib/semaphore.S
+ *
+ *  Idea from i386 code, Copyright Linus Torvalds.
+ *  Converted for ARM by Russell King
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+/*
+ * The semaphore operations have a special calling sequence
+ * that allows us to keep the distruption of the main code
+ * path to a minimum.  These routines save and restore the
+ * registers that will be touched by __down etc.
+ */
+ENTRY(__down_failed)
+	stmfd	sp!, {r0 - r3, ip, lr}
+	bl	SYMBOL_NAME(__down)
+	LOADREGS(fd, sp!, {r0 - r3, ip, pc})
+
+ENTRY(__down_interruptible_failed)
+	stmfd	sp!, {r1 - r3, ip, lr}
+	bl	SYMBOL_NAME(__down_interruptible)
+	LOADREGS(fd, sp!, {r1 - r3, ip, pc})
+
+ENTRY(__down_trylock_failed)
+	stmfd	sp!, {r1 - r3, ip, lr}
+	bl	SYMBOL_NAME(__down_trylock)
+	LOADREGS(fd, sp!, {r1 - r3, ip, pc})
+
+ENTRY(__up_wakeup)
+	stmfd	sp!, {r0 - r3, ip, lr}
+	bl	SYMBOL_NAME(__up)
+	LOADREGS(fd, sp!, {r0 - r3, ip, pc})