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Tue, 20 Feb 2018 22:04:52 +0000 Received: from mout.kundenserver.de ([212.227.17.10]) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1eoFxQ-0005CE-03 for linux-arm-kernel@lists.infradead.org; Tue, 20 Feb 2018 22:00:21 +0000 Received: from wuerfel.lan ([95.208.111.237]) by mrelayeu.kundenserver.de (mreue104 [212.227.15.145]) with ESMTPA (Nemesis) id 0M580s-1eYDOj16eU-00zHpr; Tue, 20 Feb 2018 22:59:59 +0100 From: Arnd Bergmann To: Nicolas Pitre Subject: [PATCH 5/7] ARM: fix __inflate_kernel_data stack warning for LTO Date: Tue, 20 Feb 2018 22:59:52 +0100 Message-Id: <20180220215954.4092811-6-arnd@arndb.de> X-Mailer: git-send-email 2.9.0 In-Reply-To: <20180220215954.4092811-1-arnd@arndb.de> References: <20180220215954.4092811-1-arnd@arndb.de> X-Provags-ID: V03:K0:j6Z6mLTdh/+X4G+YKxS3ATVR3daU4zabNyhWk408l8/5Z67spBE n0pCT5KxKMZP6OlGOXCaY4YuZzd5g3HbUizruyCE50CaCAsxfBFR9jVQ4Eu2LQsolfPl3G4 q3lDsZjZcv6hmaVQ7MDfjV1cRrs+BKjiSgFpfI70u5wuuA7+ZFfD31tcTE5lxsh/AJs95E6 TVpmCU33xqIXuheIpHF2w== X-UI-Out-Filterresults: notjunk:1; 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With LTO, that warning comes back. Moving the workspace into an initdata variable avoids that warning but presumably also undoes the optimization. We could also try disabling the warning locally in that file with _Pragma("GCC disagnostic"), but we lack a little bit of infrastructure to do that nicely. Signed-off-by: Arnd Bergmann --- arch/arm/kernel/Makefile | 3 --- arch/arm/kernel/head-inflate-data.c | 3 ++- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index b59ac4bf82b8..2e8d40d442a2 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -88,9 +88,6 @@ head-y := head$(MMUEXT).o obj-$(CONFIG_DEBUG_LL) += debug.o obj-$(CONFIG_EARLY_PRINTK) += early_printk.o -# This is executed very early using a temporary stack when no memory allocator -# nor global data is available. Everything has to be allocated on the stack. -CFLAGS_head-inflate-data.o := $(call cc-option,-Wframe-larger-than=10240) obj-$(CONFIG_XIP_DEFLATED_DATA) += head-inflate-data.o obj-$(CONFIG_ARM_VIRT_EXT) += hyp-stub.o diff --git a/arch/arm/kernel/head-inflate-data.c b/arch/arm/kernel/head-inflate-data.c index 6dd0ce5e6058..b208c4541bd1 100644 --- a/arch/arm/kernel/head-inflate-data.c +++ b/arch/arm/kernel/head-inflate-data.c @@ -35,10 +35,11 @@ extern char _sdata[]; * stack then there is no need to clean up before returning. */ +static __initdata struct inflate_state state; + int __init __inflate_kernel_data(void) { struct z_stream_s stream, *strm = &stream; - struct inflate_state state; char *in = __data_loc; int rc;