Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

arch/sparc64/lib/atomic.S

@@ -0,0 +1,139 @@
+/* $Id: atomic.S,v 1.4 2001/11/18 00:12:56 davem Exp $
+ * atomic.S: These things are too big to do inline.
+ *
+ * Copyright (C) 1999 David S. Miller (davem@redhat.com)
+ */
+
+#include <linux/config.h>
+#include <asm/asi.h>
+
+	/* On SMP we need to use memory barriers to ensure
+	 * correct memory operation ordering, nop these out
+	 * for uniprocessor.
+	 */
+#ifdef CONFIG_SMP
+#define ATOMIC_PRE_BARRIER	membar #StoreLoad | #LoadLoad
+#define ATOMIC_POST_BARRIER	membar #StoreLoad | #StoreStore
+#else
+#define ATOMIC_PRE_BARRIER	nop
+#define ATOMIC_POST_BARRIER	nop
+#endif
+
+	.text
+
+	/* Two versions of the atomic routines, one that
+	 * does not return a value and does not perform
+	 * memory barriers, and a second which returns
+	 * a value and does the barriers.
+	 */
+	.globl	atomic_add
+	.type	atomic_add,#function
+atomic_add: /* %o0 = increment, %o1 = atomic_ptr */
+1:	lduw	[%o1], %g1
+	add	%g1, %o0, %g7
+	cas	[%o1], %g1, %g7
+	cmp	%g1, %g7
+	bne,pn	%icc, 1b
+	 nop
+	retl
+	 nop
+	.size	atomic_add, .-atomic_add
+
+	.globl	atomic_sub
+	.type	atomic_sub,#function
+atomic_sub: /* %o0 = decrement, %o1 = atomic_ptr */
+1:	lduw	[%o1], %g1
+	sub	%g1, %o0, %g7
+	cas	[%o1], %g1, %g7
+	cmp	%g1, %g7
+	bne,pn	%icc, 1b
+	 nop
+	retl
+	 nop
+	.size	atomic_sub, .-atomic_sub
+
+	.globl	atomic_add_ret
+	.type	atomic_add_ret,#function
+atomic_add_ret: /* %o0 = increment, %o1 = atomic_ptr */
+	ATOMIC_PRE_BARRIER
+1:	lduw	[%o1], %g1
+	add	%g1, %o0, %g7
+	cas	[%o1], %g1, %g7
+	cmp	%g1, %g7
+	bne,pn	%icc, 1b
+	 add	%g7, %o0, %g7
+	ATOMIC_POST_BARRIER
+	retl
+	 sra	%g7, 0, %o0
+	.size	atomic_add_ret, .-atomic_add_ret
+
+	.globl	atomic_sub_ret
+	.type	atomic_sub_ret,#function
+atomic_sub_ret: /* %o0 = decrement, %o1 = atomic_ptr */
+	ATOMIC_PRE_BARRIER
+1:	lduw	[%o1], %g1
+	sub	%g1, %o0, %g7
+	cas	[%o1], %g1, %g7
+	cmp	%g1, %g7
+	bne,pn	%icc, 1b
+	 sub	%g7, %o0, %g7
+	ATOMIC_POST_BARRIER
+	retl
+	 sra	%g7, 0, %o0
+	.size	atomic_sub_ret, .-atomic_sub_ret
+
+	.globl	atomic64_add
+	.type	atomic64_add,#function
+atomic64_add: /* %o0 = increment, %o1 = atomic_ptr */
+1:	ldx	[%o1], %g1
+	add	%g1, %o0, %g7
+	casx	[%o1], %g1, %g7
+	cmp	%g1, %g7
+	bne,pn	%xcc, 1b
+	 nop
+	retl
+	 nop
+	.size	atomic64_add, .-atomic64_add
+
+	.globl	atomic64_sub
+	.type	atomic64_sub,#function
+atomic64_sub: /* %o0 = decrement, %o1 = atomic_ptr */
+1:	ldx	[%o1], %g1
+	sub	%g1, %o0, %g7
+	casx	[%o1], %g1, %g7
+	cmp	%g1, %g7
+	bne,pn	%xcc, 1b
+	 nop
+	retl
+	 nop
+	.size	atomic64_sub, .-atomic64_sub
+
+	.globl	atomic64_add_ret
+	.type	atomic64_add_ret,#function
+atomic64_add_ret: /* %o0 = increment, %o1 = atomic_ptr */
+	ATOMIC_PRE_BARRIER
+1:	ldx	[%o1], %g1
+	add	%g1, %o0, %g7
+	casx	[%o1], %g1, %g7
+	cmp	%g1, %g7
+	bne,pn	%xcc, 1b
+	 add	%g7, %o0, %g7
+	ATOMIC_POST_BARRIER
+	retl
+	 mov	%g7, %o0
+	.size	atomic64_add_ret, .-atomic64_add_ret
+
+	.globl	atomic64_sub_ret
+	.type	atomic64_sub_ret,#function
+atomic64_sub_ret: /* %o0 = decrement, %o1 = atomic_ptr */
+	ATOMIC_PRE_BARRIER
+1:	ldx	[%o1], %g1
+	sub	%g1, %o0, %g7
+	casx	[%o1], %g1, %g7
+	cmp	%g1, %g7
+	bne,pn	%xcc, 1b
+	 sub	%g7, %o0, %g7
+	ATOMIC_POST_BARRIER
+	retl
+	 mov	%g7, %o0
+	.size	atomic64_sub_ret, .-atomic64_sub_ret