linux-kernel - [tip:x86/urgent] x86/build: Permit building with old make versions

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Message-ID: <tip-7e6091209f7f73e2a81943020793b5ad26d645c6@git.kernel.org>
Date:   Wed, 24 May 2017 03:17:48 -0700
From:   tip-bot for Jan Kiszka <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tglx@...utronix.de, peterz@...radead.org, mingo@...nel.org,
        jan.kiszka@...mens.com, torvalds@...ux-foundation.org,
        jpoimboe@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org
Subject: [tip:x86/urgent] x86/build: Permit building with old make versions

Commit-ID:  7e6091209f7f73e2a81943020793b5ad26d645c6
Gitweb:     http://git.kernel.org/tip/7e6091209f7f73e2a81943020793b5ad26d645c6
Author:     Jan Kiszka <jan.kiszka@...mens.com>
AuthorDate: Tue, 23 May 2017 18:27:54 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 24 May 2017 09:05:17 +0200

x86/build: Permit building with old make versions

At least Make 3.82 dislikes the tab in front of the $(warning) function:

  arch/x86/Makefile:162: *** recipe commences before first target.  Stop.

Let's be gentle.

Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
Acked-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/1944fcd8-e3df-d1f7-c0e4-60aeb1917a24@siemens.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 5851411..bf240b9 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -159,7 +159,7 @@ ifdef CONFIG_FUNCTION_GRAPH_TRACER
 	# If '-Os' is enabled, disable it and print a warning.
         ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
           undefine CONFIG_CC_OPTIMIZE_FOR_SIZE
-	  $(warning Disabling CONFIG_CC_OPTIMIZE_FOR_SIZE.  Your compiler does not have -mfentry so you cannot optimize for size with CONFIG_FUNCTION_GRAPH_TRACER.)
+          $(warning Disabling CONFIG_CC_OPTIMIZE_FOR_SIZE.  Your compiler does not have -mfentry so you cannot optimize for size with CONFIG_FUNCTION_GRAPH_TRACER.)
         endif
 
     endif