linux-kernel - Re: linux-next: build warning after merge of the tip tree

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Date: Thu, 1 Feb 2024 00:59:54 -0800
From: Xin Li <xin@...or.com>
To: Stephen Rothwell <sfr@...b.auug.org.au>,
        Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc: Xin Li <xin3.li@...el.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: linux-next: build warning after merge of the tip tree

On 1/31/2024 4:14 PM, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the tip tree, today's linux-next build (x86_64 allmodconfig)
> produced this warning:
> 
> vmlinux.o: warning: objtool: fred_extint+0x1c: call to array_index_mask_nospec.constprop.0() leaves .noinstr.text section
> 
> Probably introduced by commit
> 
>    6786137bf8fd ("x86/fred: FRED entry/exit and dispatch code")
> 

The following patch gets rid of the warning.

Boris, should I send a format patch?

Thanks!
     Xin

diff --git a/arch/x86/include/asm/barrier.h b/arch/x86/include/asm/barrier.h
index 0216f63a366b..fe1e7e3cc844 100644
--- a/arch/x86/include/asm/barrier.h
+++ b/arch/x86/include/asm/barrier.h
@@ -33,7 +33,7 @@
   * Returns:
   *     0 - (index < size)
   */
-static inline unsigned long array_index_mask_nospec(unsigned long index,
+static __always_inline unsigned long array_index_mask_nospec(unsigned 
long index,
  		unsigned long size)
  {
  	unsigned long mask;