[POWERPC] Stop the TOC overflowing for large builds
authorStephen Rothwell <sfr@canb.auug.org.au>
Wed, 7 Nov 2007 05:13:29 +0000 (16:13 +1100)
committerPaul Mackerras <paulus@samba.org>
Thu, 20 Dec 2007 06:13:34 +0000 (17:13 +1100)
We were using -mno-minimal-toc on everything in arch/powerpc/kernel,
which means that all the functions in there were putting all their
TOC entries in the top-level TOC, and it was overflowing on an
allyesconfig build.  For various reasons, prom_init.c does need
-mno-minimal-toc, but the other .c files in there can use sub-TOCs
quite happily.  This change is sufficient for now to stop the TOC
overflowing; other directories under arch/powerpc also use
-mno-minimal-toc and could also be changed later if necessary.

Lmbench runs with and without this patch showed no significant speed
differences.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
arch/powerpc/kernel/Makefile

index ca51f0cf27ab3a77661ca9ff02e1e1de03196d12..9374bc9a2dd1a597332ee8afc9c12cb39971852c 100644 (file)
@@ -3,7 +3,7 @@
 #
 
 ifeq ($(CONFIG_PPC64),y)
-EXTRA_CFLAGS   += -mno-minimal-toc
+CFLAGS_prom_init.o     += -mno-minimal-toc
 endif
 ifeq ($(CONFIG_PPC32),y)
 CFLAGS_prom_init.o      += -fPIC