Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6: (98 commits)
  sparc: move select of ARCH_SUPPORTS_MSI
  sparc: drop SUN_IO
  sparc: unify sections.h
  sparc: use .data.init_task section for init_thread_union
  sparc: fix array overrun check in of_device_64.c
  sparc: unify module.c
  sparc64: prepare module_64.c for unification
  sparc64: use bit neutral Elf symbols
  sparc: unify module.h
  sparc: introduce CONFIG_BITS
  sparc: fix hardirq.h removal fallout
  sparc64: do not export pus_fs_struct
  sparc: use sparc64 version of scatterlist.h
  sparc: Commonize memcmp assembler.
  sparc: Unify strlen assembler.
  sparc: Add asm/asm.h
  sparc: Kill memcmp_32.S code which has been ifdef'd out for centuries.
  sparc: replace for_each_cpu_mask_nr with for_each_cpu
  sparc: fix sparse warnings in irq_32.c
  sparc: add include guards to kernel.h
  ...

1 files changed, 135 insertions, 0 deletions

diff --git a/arch/sparc/lib/strncpy_from_user_64.S b/arch/sparc/lib/strncpy_from_user_64.S
new file mode 100644
index 00000000000..511c8f136f9
--- /dev/null
+++ b/arch/sparc/lib/strncpy_from_user_64.S
@@ -0,0 +1,135 @@
+/*
+ * strncpy_from_user.S: Sparc64 strncpy from userspace.
+ *
+ *  Copyright (C) 1997, 1999 Jakub Jelinek (jj@ultra.linux.cz)
+ */
+
+#include <asm/asi.h>
+#include <asm/errno.h>
+
+	.data
+	.align	8
+0:	.xword	0x0101010101010101
+
+	.text
+	.align	32
+
+	/* Must return:
+	 *
+	 * -EFAULT		for an exception
+	 * count		if we hit the buffer limit
+	 * bytes copied		if we hit a null byte
+	 * (without the null byte)
+	 *
+	 * This implementation assumes:
+	 * %o1 is 8 aligned => !(%o2 & 7)
+	 * %o0 is 8 aligned (if not, it will be slooooow, but will work)
+	 *
+	 * This is optimized for the common case:
+	 * in my stats, 90% of src are 8 aligned (even on sparc32)
+	 * and average length is 18 or so.
+	 */
+
+	.globl	__strncpy_from_user
+	.type	__strncpy_from_user,#function
+__strncpy_from_user:
+	/* %o0=dest, %o1=src, %o2=count */
+	andcc	%o1, 7, %g0		! IEU1	Group
+	bne,pn	%icc, 30f		! CTI
+	 add	%o0, %o2, %g3		! IEU0
+60:	ldxa	[%o1] %asi, %g1		! Load	Group
+	brlez,pn %o2, 10f		! CTI
+	 mov	%o0, %o3		! IEU0
+50:	sethi	%hi(0b), %o4		! IEU0	Group
+	ldx	[%o4 + %lo(0b)], %o4	! Load
+	sllx	%o4, 7, %o5		! IEU1	Group
+1:	sub	%g1, %o4, %g2		! IEU0	Group
+	stx	%g1, [%o0]		! Store
+	add	%o0, 8, %o0		! IEU1
+	andcc	%g2, %o5, %g0		! IEU1	Group
+	bne,pn	%xcc, 5f		! CTI
+	 add	%o1, 8, %o1		! IEU0
+	cmp	%o0, %g3		! IEU1	Group
+	bl,a,pt %xcc, 1b		! CTI
+61:	 ldxa	[%o1] %asi, %g1		! Load
+10:	retl				! CTI	Group
+	 mov	%o2, %o0		! IEU0
+5:	srlx	%g2, 32, %g7		! IEU0	Group
+	sethi	%hi(0xff00), %o4	! IEU1
+	andcc	%g7, %o5, %g0		! IEU1	Group
+	be,pn	%icc, 2f		! CTI
+	 or	%o4, %lo(0xff00), %o4	! IEU0
+	srlx	%g1, 48, %g7		! IEU0	Group
+	andcc	%g7, %o4, %g0		! IEU1	Group
+	be,pn	%icc, 50f		! CTI
+	 andcc	%g7, 0xff, %g0		! IEU1	Group
+	be,pn	%icc, 51f		! CTI
+	 srlx	%g1, 32, %g7		! IEU0
+	andcc	%g7, %o4, %g0		! IEU1	Group
+	be,pn	%icc, 52f		! CTI
+	 andcc	%g7, 0xff, %g0		! IEU1	Group
+	be,pn	%icc, 53f		! CTI
+2:	 andcc	%g2, %o5, %g0		! IEU1	Group
+	be,pn	%icc, 2f		! CTI
+	 srl	%g1, 16, %g7		! IEU0
+	andcc	%g7, %o4, %g0		! IEU1	Group
+	be,pn	%icc, 54f		! CTI
+	 andcc	%g7, 0xff, %g0		! IEU1	Group
+	be,pn	%icc, 55f		! CTI
+	 andcc	%g1, %o4, %g0		! IEU1	Group
+	be,pn	%icc, 56f		! CTI
+	 andcc	%g1, 0xff, %g0		! IEU1	Group
+	be,a,pn	%icc, 57f		! CTI
+	 sub	%o0, %o3, %o0		! IEU0
+2:	cmp	%o0, %g3		! IEU1	Group
+	bl,a,pt	%xcc, 50b		! CTI
+62:	 ldxa	[%o1] %asi, %g1		! Load
+	retl				! CTI	Group
+	 mov	%o2, %o0		! IEU0
+50:	sub	%o0, %o3, %o0
+	retl
+	 sub	%o0, 8, %o0
+51:	sub	%o0, %o3, %o0
+	retl
+	 sub	%o0, 7, %o0
+52:	sub	%o0, %o3, %o0
+	retl
+	 sub	%o0, 6, %o0
+53:	sub	%o0, %o3, %o0
+	retl
+	 sub	%o0, 5, %o0
+54:	sub	%o0, %o3, %o0
+	retl
+	 sub	%o0, 4, %o0
+55:	sub	%o0, %o3, %o0
+	retl
+	 sub	%o0, 3, %o0
+56:	sub	%o0, %o3, %o0
+	retl
+	 sub	%o0, 2, %o0
+57:	retl
+	 sub	%o0, 1, %o0
+30:	brlez,pn %o2, 3f
+	 sub	%g0, %o2, %o3
+	add	%o0, %o2, %o0
+63:	lduba	[%o1] %asi, %o4
+1:	add	%o1, 1, %o1
+	brz,pn	%o4, 2f
+	 stb	%o4, [%o0 + %o3]
+	addcc	%o3, 1, %o3
+	bne,pt	%xcc, 1b
+64:	 lduba	[%o1] %asi, %o4
+3:	retl
+	 mov	%o2, %o0
+2:	retl
+	 add	%o2, %o3, %o0
+	.size	__strncpy_from_user, .-__strncpy_from_user
+
+	.section __ex_table,"a"
+	.align	4
+	.word	60b, __retl_efault
+	.word	61b, __retl_efault
+	.word	62b, __retl_efault
+	.word	63b, __retl_efault
+	.word	64b, __retl_efault
+	.previous