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time: Move timeconst.h into include/generated

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kernel/time/timeconst.h is moved to include/generated/ and generated 
by the top level Kbuild. This allows using timeconst.h in an earlier
build stage.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Cc: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Joe Perches <joe@perches.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Andrew Hunter <ahh@google.com>
Cc: Paul Turner <pjt@google.com>
Cc: Michal Marek <mmarek@suse.cz>
Link: http://lkml.kernel.org/r/1431951554-5563-1-git-send-email-hofrat@osadl.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Nicholas Mc Guire 2015-05-18 14:19:12 +02:00 committed by Thomas Gleixner
parent 4cfafd3082
commit 0a227985d4
4 changed files with 31 additions and 25 deletions
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34
Kbuild
View file

@ -2,8 +2,9 @@
# Kbuild for top-level directory of the kernel
# This file takes care of the following:
# 1) Generate bounds.h
# 2) Generate asm-offsets.h (may need bounds.h)
# 3) Check for missing system calls
# 2) Generate timeconst.h
# 3) Generate asm-offsets.h (may need bounds.h and timeconst.h)
# 4) Check for missing system calls
# Default sed regexp - multiline due to syntax constraints
define sed-y
@ -47,7 +48,26 @@ $(obj)/$(bounds-file): kernel/bounds.s FORCE
$(call filechk,offsets,__LINUX_BOUNDS_H__)
#####
# 2) Generate asm-offsets.h
# 2) Generate timeconst.h
timeconst-file := include/generated/timeconst.h
#always += $(timeconst-file)
targets += $(timeconst-file)
quiet_cmd_gentimeconst = GEN $@
define cmd_gentimeconst
(echo $(CONFIG_HZ) | bc -q $< ) > $@
endef
define filechk_gentimeconst
(echo $(CONFIG_HZ) | bc -q $< )
endef
$(obj)/$(timeconst-file): kernel/time/timeconst.bc FORCE
$(call filechk,gentimeconst)
#####
# 3) Generate asm-offsets.h
#
offsets-file := include/generated/asm-offsets.h
@ -57,7 +77,7 @@ targets += arch/$(SRCARCH)/kernel/asm-offsets.s
# We use internal kbuild rules to avoid the "is up to date" message from make
arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
$(obj)/$(bounds-file) FORCE
$(obj)/$(timeconst-file) $(obj)/$(bounds-file) FORCE
$(Q)mkdir -p $(dir $@)
$(call if_changed_dep,cc_s_c)
@ -65,7 +85,7 @@ $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
$(call filechk,offsets,__ASM_OFFSETS_H__)
#####
# 3) Check for missing system calls
# 4) Check for missing system calls
#
always += missing-syscalls
@ -77,5 +97,5 @@ quiet_cmd_syscalls = CALL $<
missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
$(call cmd,syscalls)
# Keep these two files during make clean
no-clean-files := $(bounds-file) $(offsets-file)
# Keep these three files during make clean
no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file)

17
kernel/time/Makefile
View file

@ -13,19 +13,4 @@ obj-$(CONFIG_TIMER_STATS) += timer_stats.o
obj-$(CONFIG_DEBUG_FS) += timekeeping_debug.o
obj-$(CONFIG_TEST_UDELAY) += test_udelay.o
$(obj)/time.o: $(obj)/timeconst.h
quiet_cmd_hzfile = HZFILE $@
cmd_hzfile = echo "hz=$(CONFIG_HZ)" > $@
targets += hz.bc
$(obj)/hz.bc: $(objtree)/include/config/hz.h FORCE
$(call if_changed,hzfile)
quiet_cmd_bc = BC $@
cmd_bc = bc -q $(filter-out FORCE,$^) > $@
targets += timeconst.h
$(obj)/timeconst.h: $(obj)/hz.bc $(src)/timeconst.bc FORCE
$(call if_changed,bc)
$(obj)/time.o: $(objtree)/include/config/

2
kernel/time/time.c
View file

@ -41,7 +41,7 @@
#include <asm/uaccess.h>
#include <asm/unistd.h>
#include "timeconst.h"
#include <generated/timeconst.h>
#include "timekeeping.h"
/*

3
kernel/time/timeconst.bc
View file

@ -50,7 +50,7 @@ define timeconst(hz) {
print "#include <linux/types.h>\n\n"
print "#if HZ != ", hz, "\n"
print "#error \qkernel/timeconst.h has the wrong HZ value!\q\n"
print "#error \qinclude/generated/timeconst.h has the wrong HZ value!\q\n"
print "#endif\n\n"
if (hz < 2) {
@ -105,4 +105,5 @@ define timeconst(hz) {
halt
}
hz = read();
timeconst(hz)