diff options
| -rw-r--r-- | arch/parisc/Kconfig | 17 | ||||
| -rw-r--r-- | arch/parisc/Makefile | 4 |
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index b77feffbadea..3df1c35a217a 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -161,6 +161,23 @@ config PREFETCH def_bool y depends on PA8X00 || PA7200 +config MLONGCALLS + bool "Enable the -mlong-calls compiler option for big kernels" + def_bool y if (!MODULES) + depends on PA8X00 + help + If you configure the kernel to include many drivers built-in instead + as modules, the kernel executable may become too big, so that the + linker will not be able to resolve some long branches and fails to link + your vmlinux kernel. In that case enabling this option will help you + to overcome this limit by using the -mlong-calls compiler option. + + Usually you want to say N here, unless you e.g. want to build + a kernel which includes all necessary drivers built-in and which can + be used for TFTP booting without the need to have an initrd ramdisk. + + Enabling this option will probably slow down your kernel. + config 64BIT bool "64-bit kernel" depends on PA8X00 diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile index 87f64d6b5dcb..ed9a14ccd066 100644 --- a/arch/parisc/Makefile +++ b/arch/parisc/Makefile @@ -64,6 +64,10 @@ ifndef CONFIG_FUNCTION_TRACER cflags-y += -ffunction-sections endif +# Use long jumps instead of long branches (needed if your linker fails to +# link a too big vmlinux executable) +cflags-$(CONFIG_MLONGCALLS) += -mlong-calls + # select which processor to optimise for cflags-$(CONFIG_PA7100) += -march=1.1 -mschedule=7100 cflags-$(CONFIG_PA7200) += -march=1.1 -mschedule=7200 |