[PARISC] Disable use of fpregs in pa_memcpy

Disable use of fpregs in pa_memcpy, and turn on the
-mdisable-fpregs flag.
Signed-off-by: Randolph Chung <tausq@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

arch/parisc/Makefile

@@ -43,7 +43,7 @@ cflags-y	+= -mno-space-regs -mfast-indirect-calls
 # 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
+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/memcpy.c

@@ -339,6 +339,7 @@ unsigned long pa_memcpy(void *dstp, const void *srcp, unsigned long len)
 	pds = (double *)pcs;
 	pdd = (double *)pcd;
 
+#if 0
 	/* Copy 8 doubles at a time */
 	while (len >= 8*sizeof(double)) {
 		register double r1, r2, r3, r4, r5, r6, r7, r8;
@@ -366,6 +367,7 @@ unsigned long pa_memcpy(void *dstp, const void *srcp, unsigned long len)
 		fstdma(d_space, r8, pdd, pmc_store_exc);
 		len -= 8*sizeof(double);
 	}
+#endif
 
 	pws = (unsigned int *)pds;
 	pwd = (unsigned int *)pdd;