linux-kernel - [PATCH] mips: disable branch profiling in boot/decompress.o

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Message-Id: <20210704230211.31257-1-rdunlap@infradead.org>
Date:   Sun,  4 Jul 2021 16:02:11 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        kernel test robot <lkp@...el.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        linux-mips@...r.kernel.org, Kyungsik Lee <kyungsik.lee@....com>
Subject: [PATCH] mips: disable branch profiling in boot/decompress.o

Use DISABLE_BRANCH_PROFILING for arch/mips/boot/compressed/decompress.o
to prevent linkage errors.

mips64-linux-ld: arch/mips/boot/compressed/decompress.o: in function `LZ4_decompress_fast_extDict':
decompress.c:(.text+0x8c): undefined reference to `ftrace_likely_update'
mips64-linux-ld: decompress.c:(.text+0xf4): undefined reference to `ftrace_likely_update'
mips64-linux-ld: decompress.c:(.text+0x200): undefined reference to `ftrace_likely_update'
mips64-linux-ld: decompress.c:(.text+0x230): undefined reference to `ftrace_likely_update'
mips64-linux-ld: decompress.c:(.text+0x320): undefined reference to `ftrace_likely_update'
mips64-linux-ld: arch/mips/boot/compressed/decompress.o:decompress.c:(.text+0x3f4): more undefined references to `ftrace_likely_update' follow

Fixes: e76e1fdfa8f8 ("lib: add support for LZ4-compressed kernel")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: linux-mips@...r.kernel.org
Cc: Kyungsik Lee <kyungsik.lee@....com>
---
 arch/mips/boot/compressed/decompress.c |    2 ++
 1 file changed, 2 insertions(+)

--- linux-next-20210701.orig/arch/mips/boot/compressed/decompress.c
+++ linux-next-20210701/arch/mips/boot/compressed/decompress.c
@@ -7,6 +7,8 @@
  * Author: Wu Zhangjin <wuzhangjin@...il.com>
  */
 
+#define DISABLE_BRANCH_PROFILING
+
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/string.h>