Re: [PATCH 1/2] x86: Cleanup TIF value gaps in shift range

[David Rientjes]

On Mon, 18 Oct 2010, H. Peter Anvin wrote:

> The problem is that someone exports something as debugging information,
> then someone else suddenly thinks it's an ABI.  I believe the same
> complainant in the past has objected to changing of formatting in dmesg,
> which is equally insane.
> 

It's not insane if there is no other way to ascertain that information.  
If it's available through sysfs or debugfs (and, even better, documented 
as part of the API in Documentation/ABI), then I don't think anyone would 
object to changing a log message.  But I don't think all log messages 
should be fair game under some general principle if they are being changed 
(instead of just extending it) without a compelling reason, such as 
technically being incorrect in its present form.
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