powerpc: EX_TABLE macro for exception tables

This macro is taken from s390, and allows more flexibility in
changing exception table format.

mpe: Put it in ppc_asm.h and only define one version using
stringinfy_in_c(). Add some empty definitions and headers to keep the
selftests happy.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 2 insertions, 4 deletions

diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index 3cc7cace194a..87fee0c8eb21 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -80,10 +80,8 @@
                 "3:     li %1,-1\n"                     \
                 "       li %0,%3\n"                     \
                 "       b 2b\n"                         \
-                ".section __ex_table,\"a\"\n"           \
-                        PPC_LONG_ALIGN "\n"             \
-                        PPC_LONG "1b,3b\n"              \
-                ".text"                                 \
+                ".previous\n"                           \
+                EX_TABLE(1b, 3b)                        \
                 : "=r" (err), "=r" (x)                  \
                 : "b" (addr), "i" (-EFAULT), "0" (err))