linux-kernel - Re: [tip:tracing/syscalls] x86: entry_32.S fix compile warnings

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Message-ID: <20090314081359.GA7405@localhost>
Date:	Sat, 14 Mar 2009 11:13:59 +0300
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	jaswinder@...nel.org, jaswinderrajput@...il.com,
	fweisbec@...il.com, hpa@...nel.org, rostedt@...dmis.org,
	tglx@...utronix.de, mingo@...e.hu
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:tracing/syscalls] x86: entry_32.S fix compile warnings -
	fix work mask bit width

[Jaswinder Singh Rajput - Sat, Mar 14, 2009 at 07:18:32AM +0000]
| Commit-ID:  95baa1a17ff80183317d815189fe1f12fdb653bc
| Gitweb:     http://git.kernel.org/tip/95baa1a17ff80183317d815189fe1f12fdb653bc
| Author:     Jaswinder Singh Rajput <jaswinder@...nel.org>
| AuthorDate: Sat, 14 Mar 2009 12:08:13 +0530
| Commit:     Ingo Molnar <mingo@...e.hu>
| CommitDate: Sat, 14 Mar 2009 08:16:01 +0100
| 
| x86: entry_32.S fix compile warnings - fix work mask bit width
| 
| Fix:
| 
|  arch/x86/kernel/entry_32.S:446: Warning: 00000000080001d1 shortened to 00000000000001d1
|  arch/x86/kernel/entry_32.S:457: Warning: 000000000800feff shortened to 000000000000feff
|  arch/x86/kernel/entry_32.S:527: Warning: 00000000080001d1 shortened to 00000000000001d1
|  arch/x86/kernel/entry_32.S:541: Warning: 000000000800feff shortened to 000000000000feff
|  arch/x86/kernel/entry_32.S:676: Warning: 0000000008000091 shortened to 0000000000000091
| 
| TIF_SYSCALL_FTRACE is 0x08000000 and until now we checked the
| first 16 bits of the work mask - bit 27 falls outside of that.
| 
| Update the entry_32.S code to check the full 32-bit mask.
| 
| Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@...il.com>
| Cc: Frederic Weisbecker <fweisbec@...il.com>
| Cc: Steven Rostedt <rostedt@...dmis.org>
| Cc: "H. Peter Anvin" <hpa@...nel.org>
| LKML-Reference: <1237012693.18733.3.camel@...satnam>
| Signed-off-by: Ingo Molnar <mingo@...e.hu>
| 
| 
| ---
|  arch/x86/kernel/entry_32.S |   18 ++++++++----------
|  1 files changed, 8 insertions(+), 10 deletions(-)
| 
...  
|  sysexit_audit:
| -	testw $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %cx
| +	testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %cx
							^^^^^
Better to point ecx here? :)

	- Cyrill -
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