linux-kernel - [BUG REPORT] arch/x86/include/asm/uaccess

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Date:   Tue, 14 Mar 2023 11:12:13 +0800
From:   Jingbo Xu <jefflexu@...ux.alibaba.com>
To:     bp@...en8.de, tglx@...utronix.de, mingo@...hat.com,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [BUG REPORT] arch/x86/include/asm/uaccess_64.h:119: Error: junk at
 end of line

Hi,

My container failed to compile the latest v6.3, and bisecting shows that
commit 5d1dd961e74334a2178264193ea813d44ce5e725 ("x86/alternatives: Add
alt_instr.flags") introduces the regression.

```
./arch/x86/include/asm/uaccess_64.h:124: Error: found 'L', expected: ')'
./arch/x86/include/asm/uaccess_64.h:124: Error: found 'L', expected: ')'
./arch/x86/include/asm/uaccess_64.h:124: Error: found 'L', expected: ')'
./arch/x86/include/asm/uaccess_64.h:124: Error: found 'L', expected: ')'
./arch/x86/include/asm/uaccess_64.h:124: Error: found 'L', expected: ')'
./arch/x86/include/asm/uaccess_64.h:124: Error: found 'L', expected: ')'
./arch/x86/include/asm/uaccess_64.h:124: Error: junk at end of line,
first unrecognized character is `L'
```

The gcc inside container is:

	gcc (GCC) 6.5.1 20181026 (Alibaba 6.5.1-1)


While the gcc on the host can compile it successfully:
	
	gcc (GCC) 9.2.1 20200522 (Alibaba 9.2.1-3 2.17)


-- 
Thanks,
Jingbo