There's a build failure with gcc9: ./arch/s390/include/asm/jump_label.h: Assembler messages: ./arch/s390/include/asm/jump_label.h:23: Error: bad expression ./arch/s390/include/asm/jump_label.h:23: Error: junk at end of line, first unrecognized character is `r' make[1]: *** [scripts/Makefile.build:277: init/main.o] Error 1
According to the toolchain people, the actual issue is the use of "X" constraint which is too permissive. Switch to using "i" instead. Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1668703 Signed-off-by: Laura Abbott <labb...@redhat.com> --- arch/s390/include/asm/jump_label.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/s390/include/asm/jump_label.h b/arch/s390/include/asm/jump_label.h index e2d3e6c43395..41dabfd8518d 100644 --- a/arch/s390/include/asm/jump_label.h +++ b/arch/s390/include/asm/jump_label.h @@ -22,7 +22,7 @@ static inline bool arch_static_branch(struct static_key *key, bool branch) ".long 0b-.,%l[label]-.\n" ".quad %0-.\n" ".popsection\n" - : : "X" (&((char *)key)[branch]) : : label); + : : "i" (&((char *)key)[branch]) : : label); return false; label: return true; @@ -36,7 +36,7 @@ static inline bool arch_static_branch_jump(struct static_key *key, bool branch) ".long 0b-.,%l[label]-.\n" ".quad %0-.\n" ".popsection\n" - : : "X" (&((char *)key)[branch]) : : label); + : : "i" (&((char *)key)[branch]) : : label); return false; label: return true; -- 2.20.1
