ARM: allow 16-bit instructions in ALT_UP()
Allow ALT_UP() to cope with a 16-bit Thumb instruction by automatically
inserting a following nop instruction. This allows us to care less
about getting the assembler to emit a 32-bit thumb instruction.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h
index f67fd3a..186270b 100644
--- a/arch/arm/include/asm/assembler.h
+++ b/arch/arm/include/asm/assembler.h
@@ -237,6 +237,9 @@
.pushsection ".alt.smp.init", "a" ;\
.long 9998b ;\
9997: instr ;\
+ .if . - 9997b == 2 ;\
+ nop ;\
+ .endif ;\
.if . - 9997b != 4 ;\
.error "ALT_UP() content must assemble to exactly 4 bytes";\
.endif ;\