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22b970497

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    Toshi Kani authored and Thomas Gleixner committed
    __ioremap_check_ram() has a WARN_ONCE() which is emitted when the
    given pfn range is not RAM. The warning is bogus in two aspects:
    
    - it never triggers since walk_system_ram_range() only calls
      __ioremap_check_ram() for RAM ranges.
    
    - the warning message is wrong as it says: "ioremap on RAM' after it
      established that the pfn range is not RAM.
    
    Move the WARN_ONCE() to __ioremap_caller(), and update the message to
    include the address range so we get an actual warning when something
    tries to ioremap system RAM.
    
    [ tglx: Massaged changelog ]
    
    Signed-off-by: default avatarToshi Kani <toshi.kani@hp.com>
    Reviewed-by: default avatarDan Williams <dan.j.williams@intel.com>
    Cc: Roland Dreier <roland@purestorage.com>
    Cc: Luis R. Rodriguez <mcgrof@suse.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: linux-mm@kvack.org
    Link: http://lkml.kernel.org/r/1437088996-28511-2-git-send-email-toshi.kani@hp.com
    
    
    Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    1c9cf9b2
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