linux-kernel - [PATCH v3 1/2] MIPS: SGI-IP22: Remove unnecessary check of GCC option

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Date:   Mon, 13 Dec 2021 17:57:56 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     Jason Self <jason@...ehome.net>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Ryutaroh Matsumoto <ryutaroh@....e.titech.ac.jp>,
        Nathan Chancellor <nathan@...nel.org>,
        Xuefeng Li <lixuefeng@...ngson.cn>, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 1/2] MIPS: SGI-IP22: Remove unnecessary check of GCC option

According to the document "Minimal requirements to compile the Kernel [1],
the minimal version of GCC is 5.1, -mr10k-cache-barrier=store is supported
with GCC 5.1 [2], so just remove the unnecessary check to fix the build
error [3]:

  arch/mips/sgi-ip22/Platform:28: *** gcc doesn't support needed option -mr10k-cache-barrier=store.  Stop.

[1] https://www.kernel.org/doc/html/latest/process/changes.html
[2] https://gcc.gnu.org/onlinedocs/gcc-5.1.0/gcc/MIPS-Options.html
[3] https://github.com/ClangBuiltLinux/linux/issues/1543

Reported-by: Ryutaroh Matsumoto <ryutaroh@....e.titech.ac.jp>
Suggested-by: Nathan Chancellor <nathan@...nel.org>
Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 arch/mips/sgi-ip22/Platform | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/mips/sgi-ip22/Platform b/arch/mips/sgi-ip22/Platform
index 62fa30b..a4c46e3 100644
--- a/arch/mips/sgi-ip22/Platform
+++ b/arch/mips/sgi-ip22/Platform
@@ -23,10 +23,5 @@ endif
 # be 16kb aligned or the handling of the current variable will break.
 # Simplified: what IP22 does at 128MB+ in ksegN, IP28 does at 512MB+ in xkphys
 #
-ifdef CONFIG_SGI_IP28
-  ifeq ($(call cc-option-yn,-march=r10000 -mr10k-cache-barrier=store), n)
-      $(error gcc doesn't support needed option -mr10k-cache-barrier=store)
-  endif
-endif
 cflags-$(CONFIG_SGI_IP28)	+= -mr10k-cache-barrier=store -I$(srctree)/arch/mips/include/asm/mach-ip28
 load-$(CONFIG_SGI_IP28)		+= 0xa800000020004000
-- 
2.1.0