diff options
| -rw-r--r-- | arch/powerpc/include/asm/feature-fixups.h | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/feature-fixups.h b/arch/powerpc/include/asm/feature-fixups.h index fbd406cd6916..c509f784a5f6 100644 --- a/arch/powerpc/include/asm/feature-fixups.h +++ b/arch/powerpc/include/asm/feature-fixups.h @@ -36,6 +36,24 @@ label##2: \ .align 2; \ label##3: + +#ifndef CONFIG_CC_IS_CLANG +#define CHECK_ALT_SIZE(else_size, body_size) \ + .ifgt (else_size) - (body_size); \ + .error "Feature section else case larger than body"; \ + .endif; +#else +/* + * If we use the ifgt syntax above, clang's assembler complains about the + * expression being non-absolute when the code appears in an inline assembly + * statement. + * As a workaround use an .org directive that has no effect if the else case + * instructions are smaller than the body, but fails otherwise. + */ +#define CHECK_ALT_SIZE(else_size, body_size) \ + .org . + ((else_size) > (body_size)); +#endif + #define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect) \ label##4: \ .popsection; \ @@ -48,9 +66,7 @@ label##5: \ FTR_ENTRY_OFFSET label##2b-label##5b; \ FTR_ENTRY_OFFSET label##3b-label##5b; \ FTR_ENTRY_OFFSET label##4b-label##5b; \ - .ifgt (label##4b- label##3b)-(label##2b- label##1b); \ - .error "Feature section else case larger than body"; \ - .endif; \ + CHECK_ALT_SIZE((label##4b-label##3b), (label##2b-label##1b)); \ .popsection; |