Blackfin: fix command line corruption with DEBUG_DOUBLEFAULT

Commit 6b3087c6 (which introduced Blackfin SMP) broke command line passing
when the DEBUG_DOUBLEFAULT config option was enabled.  Switch the code to
using a scratch register and not R7 which holds the command line.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/arch/blackfin/mach-common/head.S b/arch/blackfin/mach-common/head.S
index 01d62ff..f826f6b 100644 (file)
--- a/arch/blackfin/mach-common/head.S
+++ b/arch/blackfin/mach-common/head.S
@@ -124,25 +124,25 @@ ENTRY(__start)
         * below
         */
        GET_PDA(p0, r0);
-       r7 = [p0 + PDA_RETX];
+       r6 = [p0 + PDA_RETX];
        p1.l = _init_saved_retx;
        p1.h = _init_saved_retx;
-       [p1] = r7;
+       [p1] = r6;
 
-       r7 = [p0 + PDA_DCPLB];
+       r6 = [p0 + PDA_DCPLB];
        p1.l = _init_saved_dcplb_fault_addr;
        p1.h = _init_saved_dcplb_fault_addr;
-       [p1] = r7;
+       [p1] = r6;
 
-       r7 = [p0 + PDA_ICPLB];
+       r6 = [p0 + PDA_ICPLB];
        p1.l = _init_saved_icplb_fault_addr;
        p1.h = _init_saved_icplb_fault_addr;
-       [p1] = r7;
+       [p1] = r6;
 
-       r7 = [p0 + PDA_SEQSTAT];
+       r6 = [p0 + PDA_SEQSTAT];
        p1.l = _init_saved_seqstat;
        p1.h = _init_saved_seqstat;
-       [p1] = r7;
+       [p1] = r6;
 #endif
 
        /* Initialize stack pointer */