[PATCH] parisc: new memcpy routines

 - new memcpy routine, replaces memcpy, bcopy, copy_{from,to,in}_user
   implementations
 - workaround gcc-3.0 limitations for asm()
 - Pip and Rufus pointed out the flaw in the current misaligned memcopy
   routines.  Randolph now owes lots of Milk bones.
 - updates to work with testsuite
 - sparse annotations
 - Improve copy performance for small and unaligned copies
 - Enable merge optimization for non-PA20 builds too
Committed-by: Randolph Chung <tausq@parisc-linux.org>
Committed-by: James Bottomley <jejb@parisc-linux.org>

arch/parisc/Makefile

@@ -37,8 +37,10 @@ cflags-y	:= -pipe
 # are not in gcc 3.2.
 cflags-y	+= -mno-space-regs -mfast-indirect-calls
 
-# No fixed-point multiply
-cflags-y	+= -mdisable-fpregs
+# Currently we save and restore fpregs on all kernel entry/interruption paths.
+# If that gets optimized, we might need to disable the use of fpregs in the
+# kernel.
+#cflags-y	+= -mdisable-fpregs
 
 # Without this, "ld -r" results in .text sections that are too big
 # (> 0x40000) for branches to reach stubs.

arch/parisc/lib/Makefile

@@ -2,6 +2,6 @@
 # Makefile for parisc-specific library files
 #
 
-lib-y	:= lusercopy.o bitops.o checksum.o io.o memset.o
+lib-y	:= lusercopy.o bitops.o checksum.o io.o memset.o fixup.o memcpy.o
 
 lib-$(CONFIG_SMP) += debuglocks.o

include/asm-parisc/string.h

+#ifndef _PA_STRING_H_
+#define _PA_STRING_H_
 
 #define __HAVE_ARCH_MEMSET
 extern void * memset(void *, int, size_t);
+
+#define __HAVE_ARCH_MEMCPY
+void * memcpy(void * dest,const void *src,size_t count);
+
+#define __HAVE_ARCH_BCOPY
+void bcopy(const void * srcp, void * destp, size_t count);
+
+#endif

include/asm-parisc/uaccess.h

@@ -267,12 +267,12 @@ extern long lstrnlen_user(const char __user *,long);
 #define clear_user lclear_user
 #define __clear_user lclear_user
 
-#define copy_from_user lcopy_from_user
-#define __copy_from_user lcopy_from_user
-#define copy_to_user lcopy_to_user
-#define __copy_to_user lcopy_to_user
-#define copy_in_user lcopy_in_user
-#define __copy_in_user lcopy_in_user
+unsigned long copy_to_user(void __user *dst, const void *src, unsigned long len);
+#define __copy_to_user copy_to_user
+unsigned long copy_from_user(void *dst, const void __user *src, unsigned long len);
+#define __copy_from_user copy_from_user
+unsigned long copy_in_user(void __user *dst, const void __user *src, unsigned long len);
+#define __copy_in_user copy_in_user
 #define __copy_to_user_inatomic __copy_to_user
 #define __copy_from_user_inatomic __copy_from_user