[PATCH] ppc64: Fix recent regression

As noted by Olof Johansson <olof@lixom.net>:

  "A recent patch changed the way the LPAR bit is checked during early
   boot.  This resulted in a polarity change in a conditional branch
   without changing the branch, causing at least some legacy machines to
   not boot."

This fixes it.

Signed-off-by: Jimi Xenidis <jimix@watson.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/ppc64/kernel/head.S b/arch/ppc64/kernel/head.S
index 58c3147..72c6104 100644 (file)
--- a/arch/ppc64/kernel/head.S
+++ b/arch/ppc64/kernel/head.S
@@ -1649,7 +1649,7 @@ _GLOBAL(__secondary_start)
        ld      r3,0(r3)
        lwz     r3,PLATFORM(r3)         /* r3 = platform flags           */
        andi.   r3,r3,PLATFORM_LPAR     /* Test if bit 0 is set (LPAR bit) */
-       bne     98f
+       beq     98f                     /* branch if result is 0  */
        mfspr   r3,PVR
        srwi    r3,r3,16
        cmpwi   r3,0x37                 /* SStar  */
@@ -1813,7 +1813,7 @@ _STATIC(start_here_multiplatform)
        ld      r3,0(r3)
        lwz     r3,PLATFORM(r3)         /* r3 = platform flags */
        andi.   r3,r3,PLATFORM_LPAR     /* Test if bit 0 is set (LPAR bit) */
-       bne     98f
+       beq     98f                     /* branch if result is 0  */
        mfspr   r3,PVR
        srwi    r3,r3,16
        cmpwi   r3,0x37                 /* SStar */
@@ -1834,7 +1834,7 @@ _STATIC(start_here_multiplatform)
        lwz     r3,PLATFORM(r3)         /* r3 = platform flags */
        /* Test if bit 0 is set (LPAR bit) */
        andi.   r3,r3,PLATFORM_LPAR
-       bne     98f
+       bne     98f                     /* branch if result is !0  */
        LOADADDR(r6,_SDR1)              /* Only if NOT LPAR */
        sub     r6,r6,r26
        ld      r6,0(r6)                /* get the value of _SDR1 */