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kbuild/extable: Hook up sortextable into the build system.

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Define a config variable BUILDTIME_EXTABLE_SORT to control build time
sorting of the kernel's exception table.

Patch Makefile to do the sorting when BUILDTIME_EXTABLE_SORT is
selected.

Signed-off-by: David Daney <david.daney@cavium.com>
Link: http://lkml.kernel.org/r/1334872799-14589-4-git-send-email-ddaney.cavm@gmail.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
David Daney 2012-04-19 14:59:57 -07:00 committed by H. Peter Anvin
parent d219e2e86a
commit 1dbdc6f177
2 changed files with 13 additions and 0 deletions
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10
Makefile
View File

@ -784,6 +784,10 @@ quiet_cmd_vmlinux_version = GEN .version
quiet_cmd_sysmap = SYSMAP
cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
# Sort exception table at build time
quiet_cmd_sortextable = SORTEX
cmd_sortextable = $(objtree)/scripts/sortextable
# Link of vmlinux
# If CONFIG_KALLSYMS is set .version is already updated
# Generate System.map and verify that the content is consistent
@ -796,6 +800,12 @@ define rule_vmlinux__
$(call cmd,vmlinux__)
$(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
$(if $(CONFIG_BUILDTIME_EXTABLE_SORT), \
$(Q)$(if $($(quiet)cmd_sortextable), \
echo ' $($(quiet)cmd_sortextable) vmlinux' &&) \
$(cmd_sortextable) vmlinux)
$(Q)$(if $($(quiet)cmd_sysmap), \
echo ' $($(quiet)cmd_sysmap) System.map' &&) \
$(cmd_sysmap) $@ System.map; \

3
init/Kconfig
View File

@ -27,6 +27,9 @@ config IRQ_WORK
bool
depends on HAVE_IRQ_WORK
config BUILDTIME_EXTABLE_SORT
bool
menu "General setup"
config EXPERIMENTAL