microblaze: extable: sort the exception table at build time

Sort the exception table at build-time rather than during boot.

Microblaze is the same case as AARCH64 that's why EM_MICROBLAZE
conditional check was added to allow cross-compilation on machines which
are not running the latest libc-dev.

Inspired by AARCH64 commit adace89562c7 ("arm64: extable: sort the
exception table at build time").

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: David Daney <david.daney@cavium.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 6 insertions, 0 deletions

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index e23cccde9c27..8d581ab06c5d 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -30,6 +30,7 @@ config MICROBLAZE
         select MODULES_USE_ELF_RELA
         select CLONE_BACKWARDS3
         select CLKSRC_OF
+        select BUILDTIME_EXTABLE_SORT
 
 config SWAP
         def_bool n
diff --git a/scripts/sortextable.c b/scripts/sortextable.c
index 7941fbdfb050..cc49062acdee 100644
--- a/scripts/sortextable.c
+++ b/scripts/sortextable.c
@@ -39,6 +39,10 @@
 #define EM_AARCH64      183
 #endif
 
+#ifndef EM_MICROBLAZE
+#define EM_MICROBLAZE   189
+#endif
+
 static int fd_map;      /* File descriptor for file being modified. */
 static int mmap_failed; /* Boolean flag. */
 static void *ehdr_curr; /* current ElfXX_Ehdr *  for resource cleanup */
@@ -275,6 +279,7 @@ do_file(char const *const fname)
         case EM_ARCOMPACT:
         case EM_ARM:
         case EM_AARCH64:
+        case EM_MICROBLAZE:
         case EM_MIPS:
                 break;
         }  /* end switch */