From: Vincenzo Frascino <vincenzo.frascino@arm.com> To: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: catalin.marinas@arm.com, will.deacon@arm.com, arnd@arndb.de, linux@armlinux.org.uk, daniel.lezcano@linaro.org, tglx@linutronix.de, salyzyn@android.com, pcc@google.com, 0x7f454c46@gmail.com, linux@rasmusvillemoes.dk, huw@codeweavers.com, sthotton@marvell.com, andre.przywara@arm.com, luto@kernel.org, john.stultz@linaro.org, naohiro.aota@wdc.com, yamada.masahiro@socionext.com, Will Deacon <will@kernel.org> Subject: [PATCH] arm64: compat: Fix flip/flop vdso building bug Date: Fri, 12 Jul 2019 13:06:18 +0100 [thread overview] Message-ID: <20190712120618.6207-1-vincenzo.frascino@arm.com> (raw) In-Reply-To: <20190712101556.17833-2-naohiro.aota@wdc.com> Running "make" on an already compiled kernel tree will rebuild the vdso32 library even if this has not been modified. $ make GEN Makefile Using linux as source for kernel CALL linux/scripts/atomic/check-atomics.sh CALL linux/scripts/checksyscalls.sh VDSOCHK arch/arm64/kernel/vdso32/vdso.so.raw VDSOSYM include/generated/vdso32-offsets.h CHK include/generated/compile.h CC arch/arm64/kernel/signal.o CC arch/arm64/kernel/vdso.o CC arch/arm64/kernel/signal32.o VDSOL arch/arm64/kernel/vdso32/vdso.so.raw MUNGE arch/arm64/kernel/vdso32/vdso.so.dbg OBJCOPY arch/arm64/kernel/vdso32/vdso.so AS arch/arm64/kernel/vdso32/vdso.o AR arch/arm64/kernel/vdso32/built-in.a AR arch/arm64/kernel/built-in.a GEN .version CHK include/generated/compile.h UPD include/generated/compile.h CC init/version.o AR init/built-in.a LD vmlinux.o MODPOST vmlinux.o The issue is generated by the fact that "if_changed" is called twice in a single target. Fix the build bug merging the two commands into a single function. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Fixes: a7f71a2c8903 ("arm64: compat: Add vDSO") Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> --- arch/arm64/kernel/vdso32/Makefile | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile index 288c14d30b45..fb572b6f1bf5 100644 --- a/arch/arm64/kernel/vdso32/Makefile +++ b/arch/arm64/kernel/vdso32/Makefile @@ -144,8 +144,7 @@ $(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/$(munge) FORCE # Link rule for the .so file, .lds has to be first $(obj)/vdso.so.raw: $(src)/vdso.lds $(obj-vdso) FORCE - $(call if_changed,vdsold) - $(call if_changed,vdso_check) + $(call if_changed,vdsold_and_vdso_check) # Compilation rules for the vDSO sources $(c-obj-vdso): %.o: %.c FORCE @@ -156,6 +155,9 @@ $(asm-obj-vdso): %.o: %.S FORCE $(call if_changed_dep,vdsoas) # Actual build commands +quiet_cmd_vdsold_and_vdso_check = LD $@ + cmd_vdsold_and_vdso_check = $(cmd_vdsold); $(cmd_vdso_check) + quiet_cmd_vdsold = VDSOL $@ cmd_vdsold = $(COMPATCC) -Wp,-MD,$(depfile) $(VDSO_LDFLAGS) \ -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@ -- 2.22.0
WARNING: multiple messages have this Message-ID (diff)
From: Vincenzo Frascino <vincenzo.frascino@arm.com> To: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: naohiro.aota@wdc.com, luto@kernel.org, arnd@arndb.de, huw@codeweavers.com, catalin.marinas@arm.com, daniel.lezcano@linaro.org, will.deacon@arm.com, linux@armlinux.org.uk, salyzyn@android.com, yamada.masahiro@socionext.com, andre.przywara@arm.com, john.stultz@linaro.org, 0x7f454c46@gmail.com, linux@rasmusvillemoes.dk, Will Deacon <will@kernel.org>, tglx@linutronix.de, sthotton@marvell.com, pcc@google.com Subject: [PATCH] arm64: compat: Fix flip/flop vdso building bug Date: Fri, 12 Jul 2019 13:06:18 +0100 [thread overview] Message-ID: <20190712120618.6207-1-vincenzo.frascino@arm.com> (raw) In-Reply-To: <20190712101556.17833-2-naohiro.aota@wdc.com> Running "make" on an already compiled kernel tree will rebuild the vdso32 library even if this has not been modified. $ make GEN Makefile Using linux as source for kernel CALL linux/scripts/atomic/check-atomics.sh CALL linux/scripts/checksyscalls.sh VDSOCHK arch/arm64/kernel/vdso32/vdso.so.raw VDSOSYM include/generated/vdso32-offsets.h CHK include/generated/compile.h CC arch/arm64/kernel/signal.o CC arch/arm64/kernel/vdso.o CC arch/arm64/kernel/signal32.o VDSOL arch/arm64/kernel/vdso32/vdso.so.raw MUNGE arch/arm64/kernel/vdso32/vdso.so.dbg OBJCOPY arch/arm64/kernel/vdso32/vdso.so AS arch/arm64/kernel/vdso32/vdso.o AR arch/arm64/kernel/vdso32/built-in.a AR arch/arm64/kernel/built-in.a GEN .version CHK include/generated/compile.h UPD include/generated/compile.h CC init/version.o AR init/built-in.a LD vmlinux.o MODPOST vmlinux.o The issue is generated by the fact that "if_changed" is called twice in a single target. Fix the build bug merging the two commands into a single function. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Fixes: a7f71a2c8903 ("arm64: compat: Add vDSO") Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> --- arch/arm64/kernel/vdso32/Makefile | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile index 288c14d30b45..fb572b6f1bf5 100644 --- a/arch/arm64/kernel/vdso32/Makefile +++ b/arch/arm64/kernel/vdso32/Makefile @@ -144,8 +144,7 @@ $(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/$(munge) FORCE # Link rule for the .so file, .lds has to be first $(obj)/vdso.so.raw: $(src)/vdso.lds $(obj-vdso) FORCE - $(call if_changed,vdsold) - $(call if_changed,vdso_check) + $(call if_changed,vdsold_and_vdso_check) # Compilation rules for the vDSO sources $(c-obj-vdso): %.o: %.c FORCE @@ -156,6 +155,9 @@ $(asm-obj-vdso): %.o: %.S FORCE $(call if_changed_dep,vdsoas) # Actual build commands +quiet_cmd_vdsold_and_vdso_check = LD $@ + cmd_vdsold_and_vdso_check = $(cmd_vdsold); $(cmd_vdso_check) + quiet_cmd_vdsold = VDSOL $@ cmd_vdsold = $(COMPATCC) -Wp,-MD,$(depfile) $(VDSO_LDFLAGS) \ -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@ -- 2.22.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-07-12 12:06 UTC|newest] Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-07-12 10:15 [PATCH v2 1/2] x86/vdso: fix flip/flop vdso build bug Naohiro Aota 2019-07-12 10:15 ` Naohiro Aota 2019-07-12 10:15 ` [PATCH v2 2/2] arm64/vdso: " Naohiro Aota 2019-07-12 10:15 ` Naohiro Aota 2019-07-12 12:06 ` Vincenzo Frascino [this message] 2019-07-12 12:06 ` [PATCH] arm64: compat: Fix flip/flop vdso building bug Vincenzo Frascino 2019-07-12 12:10 ` [PATCH v2 2/2] arm64/vdso: fix flip/flop vdso build bug Vincenzo Frascino 2019-07-12 12:10 ` Vincenzo Frascino 2019-07-12 14:55 ` Masahiro Yamada 2019-07-12 14:55 ` Masahiro Yamada 2019-07-12 15:37 ` Will Deacon 2019-07-12 15:37 ` Will Deacon 2019-07-18 11:41 ` [PATCH] arm64: vdso: Cleanup Makefiles Vincenzo Frascino 2019-07-18 11:41 ` Vincenzo Frascino 2019-07-19 8:04 ` Will Deacon 2019-07-19 8:04 ` Will Deacon 2019-07-19 9:49 ` Vincenzo Frascino 2019-07-19 9:49 ` Vincenzo Frascino 2019-07-19 10:10 ` [PATCH v2] " Vincenzo Frascino 2019-07-19 10:10 ` Vincenzo Frascino 2019-07-22 9:41 ` Will Deacon 2019-07-22 9:41 ` Will Deacon 2019-07-12 12:09 ` [PATCH v2 1/2] x86/vdso: fix flip/flop vdso build bug Vincenzo Frascino 2019-07-12 12:09 ` Vincenzo Frascino 2019-07-12 14:54 ` Masahiro Yamada 2019-07-12 14:54 ` Masahiro Yamada 2019-07-12 15:41 ` [tip:x86/urgent] x86/vdso: Fix " tip-bot for Naohiro Aota
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