Subject: [PATCH] powerpc: build time sort extable

From: Nicholas Piggin <[email-masked]>
Date: Fri, 7 Oct 2016 22:29:41 +1100

Can we just switch this on? Powerpc does not use relative extables
(that's a nice exercise left for the reader), so it should just use
the standard sort.

This patch seems to work, famous last words...

Sorting probably only takes a few ms on any real hardware, but on on
very large kernel configs, extable sorting can take several seconds in
simulators and be a noticable cost to booting.

---
 arch/powerpc/Kconfig  | 1 +
 scripts/sortextable.c | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 927d2ab..2340483 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -85,6 +85,7 @@ config ARCH_HAS_DMA_SET_COHERENT_MASK
 config PPC
 	bool
 	default y
+	select BUILDTIME_EXTABLE_SORT
 	select ARCH_MIGHT_HAVE_PC_PARPORT
 	select ARCH_MIGHT_HAVE_PC_SERIO
 	select BINFMT_ELF
diff --git a/scripts/sortextable.c b/scripts/sortextable.c
index f453b7c..30337e1 100644
--- a/scripts/sortextable.c
+++ b/scripts/sortextable.c
@@ -324,6 +324,8 @@ do_file(char const *const fname)
 	case EM_MICROBLAZE:
 	case EM_MIPS:
 	case EM_XTENSA:
+	case EM_PPC:
+	case EM_PPC64:
 		break;
 	}  /* end switch */
 
-- 
2.9.3