linux-kernel - [PATCH] blackfin: Makefile: Skip reloc overflow issue when COMPILE

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Message-ID: <BLU437-SMTP849295A31898E0F79D8A58B9FC0@phx.gbl>
Date:	Thu, 9 Apr 2015 05:03:21 +0800
From:	Chen Gang <xili_gchen_5257@...mail.com>
To:	realmz6@...il.com,
	Richard Weinberger <richard.weinberger@...il.com>
CC:	adi-buildroot-devel@...ts.sourceforge.net,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] blackfin: Makefile: Skip reloc overflow issue when COMPILE_TEST
 enabled

l1_text is at L1_CODE_START (e.g. for bf533, 0xff800000). If the kernel
is too big, it may be overwritten, the related issue:

    LD      init/built-in.o
  init/built-in.o: In function `do_early_param':
  init/main.c:(.init.text+0xe0): relocation truncated to fit: R_BFIN_PCREL24 against symbol `strcmp' defined in .l1.text section in arch/blackfin/lib/lib.a(strcmp.o)
  init/main.c:(.init.text+0x10e): relocation truncated to fit: R_BFIN_PCREL24 against symbol `strcmp' defined in .l1.text section in arch/blackfin/lib/lib.a(strcmp.o)
  init/built-in.o: In function `unknown_bootoption':

blackfin is for embedded system, the size limitition is acceptable, so
it is not the real world issue, which should be skipped if COMPILE_TEST
enabled.


Signed-off-by: Chen Gang <gang.chen.5i5j@...il.com>
---
 arch/blackfin/Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/blackfin/Makefile b/arch/blackfin/Makefile
index 2ece4e3..e5195b4 100644
--- a/arch/blackfin/Makefile
+++ b/arch/blackfin/Makefile
@@ -20,6 +20,9 @@ endif
 KBUILD_AFLAGS           += $(call cc-option,-mno-fdpic)
 KBUILD_CFLAGS_MODULE    += -mlong-calls
 LDFLAGS                 += -m elf32bfin
+ifeq ($(CONFIG_COMPILE_TEST),y)
+LDFLAGS                 += --noinhibit-exec
+endif
 
 KBUILD_DEFCONFIG := BF537-STAMP_defconfig
 
-- 
1.9.3
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