[PATCH] powerpc/8xx: Force VIRT_IMMR_BASE to be a positive number

Scott Wood oss at buserror.net
Sat Jul 9 18:28:40 AEST 2016

The asm-offsets mechanism generates signed numbers, even if the
input value is explicitly unsigned.  This causes a problem with
older binutils (e.g. 2.23), which sign-extend a negative number
when @h is applied.  Thus, this instruction:

	cmpli   cr0, r11, VIRT_IMMR_BASE at h

resulted in this:

Error: operand out of range (0xfffffff0 is not between 0x00000000 and

By casting to a larger type, we can force the output to be expressed
as a positive number.

Signed-off-by: Scott Wood <oss at buserror.net>
Cc: Christophe Leroy <christophe.leroy at c-s.fr>
 arch/powerpc/kernel/asm-offsets.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 247f640..b89d14c 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -754,7 +754,7 @@ int main(void)
 #ifdef CONFIG_PPC_8xx
+	DEFINE(VIRT_IMMR_BASE, (u64)__fix_to_virt(FIX_IMMR_BASE));
 	return 0;

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