MIPS: Apply `.insn' to fixup labels throughout

Fix the issue with the ISA bit being lost in fixups that jump to labels
placed just before a section switch.  Such a switch leads to the ISA bit
being lost, because GAS concludes there is no code that follows and
therefore the label refers to data.  Use the `.insn' pseudo-op to
convince the tool this is not the case.

This lack of label annotation leads to microMIPS compilation errors
like:

mips-linux-gnu-ld: arch/mips/built-in.o: .fixup+0x3b8: Unsupported jump between ISA modes; consider recompiling with interlinking enabled.
mips-linux-gnu-ld: final link failed: Bad value

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8483/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 4a4f9dda5658..604b558809c4 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -117,6 +117,7 @@ static inline int mips_atomic_set(unsigned long addr, unsigned long new)
                 "2:     sc      %[tmp], (%[addr])                       \n"
                 "       beqzl   %[tmp], 1b                              \n"
                 "3:                                                     \n"
+                "       .insn                                           \n"
                 "       .section .fixup,\"ax\"                          \n"
                 "4:     li      %[err], %[efault]                       \n"
                 "       j       3b                                      \n"
@@ -142,6 +143,7 @@ static inline int mips_atomic_set(unsigned long addr, unsigned long new)
                 "2:     sc      %[tmp], (%[addr])                       \n"
                 "       bnez    %[tmp], 4f                              \n"
                 "3:                                                     \n"
+                "       .insn                                           \n"
                 "       .subsection 2                                   \n"
                 "4:     b       1b                                      \n"
                 "       .previous                                       \n"