Re: [PATCH 02/33] mm: overload get_user_pages() functions

On 02/16/2016 12:36 AM, Ingo Molnar wrote:

quoted

quoted

From: Dave Hansen <dave.hansen@linux.intel.com>

The concept here was a suggestion from Ingo.  The implementation
horrors are all mine.

This allows get_user_pages(), get_user_pages_unlocked(), and
get_user_pages_locked() to be called with or without the
leading tsk/mm arguments.  We will give a compile-time warning
about the old style being __deprecated and we will also
WARN_ON() if the non-remote version is used for a remote-style
access.

So at minimum this should be WARN_ON_ONCE(), to make it easier to recover some 
meaningful kernel log from such incidents.

I went to go fix this in the code but realized that I coded it up as
WARN_ONCE().  The description was just imprecise.  So I won't be sending
a code fix for this.

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