linux/include
Masahiro Yamada bbda5ec671 kbuild: simplify dependency generation for CONFIG_TRIM_UNUSED_KSYMS
My main motivation of this commit is to clean up scripts/Kbuild.include
and scripts/Makefile.build.

Currently, CONFIG_TRIM_UNUSED_KSYMS works with a tricky gimmick;
possibly exported symbols are detected by letting $(CPP) replace
EXPORT_SYMBOL* with a special string '=== __KSYM_*===', which is
post-processed by sed, and passed to fixdep. The extra preprocessing
is costly, and hacking cmd_and_fixdep is ugly.

I came up with a new way to find exported symbols; insert a dummy
symbol __ksym_marker_* to each potentially exported symbol. Those
dummy symbols are picked up by $(NM), post-processed by sed, then
appended to .*.cmd files. I collected the post-process part to a
new shell script scripts/gen_ksymdeps.sh for readability. The dummy
symbols are put into the .discard.* section so that the linker
script rips them off the final vmlinux or modules.

A nice side-effect is building with CONFIG_TRIM_UNUSED_KSYMS will
be much faster.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
2018-12-01 23:13:14 +09:00
..
acpi pci-v4.20-changes 2018-10-25 06:50:48 -07:00
asm-generic kbuild: simplify dependency generation for CONFIG_TRIM_UNUSED_KSYMS 2018-12-01 23:13:14 +09:00
clocksource
crypto KEYS: asym_tpm: extract key size & public key [ver #2] 2018-10-26 09:30:46 +01:00
drm drm, i915, amdgpu, bridge + core quirk 2018-11-02 10:58:20 -07:00
dt-bindings This time it looks like a quieter release cycle in the clk tree. I guess that's 2018-10-31 11:08:30 -07:00
keys KEYS: Move trusted.h to include/keys [ver #2] 2018-10-26 09:30:47 +01:00
kvm
linux kbuild: simplify dependency generation for CONFIG_TRIM_UNUSED_KSYMS 2018-12-01 23:13:14 +09:00
math-emu
media media updates for v4.20-rc1 2018-10-31 10:53:29 -07:00
memory
misc
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2018-11-05 17:19:25 -08:00
pcmcia
ras
rdma First merge window pull request 2018-10-26 07:38:19 -07:00
scsi
soc ARM: SoC driver updates for 4.17 2018-10-29 15:16:01 -07:00
sound ASoC: Updates for v5.0/v4.20 2018-10-22 23:26:37 +02:00
target
trace Merge branch 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-11-01 19:58:52 -07:00
uapi drm: i915, amdgpu, sun4i, exynos and etnaviv fixes 2018-11-10 13:29:47 -06:00
video
xen CONFIG_XEN_PV breaks xen_create_contiguous_region on ARM 2018-11-02 17:18:34 +01:00