x86/mm: Fix range check in tlbflush debugfs interface

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Since the shift count settable there is used for shifting values
of type "unsigned long", its value must not match or exceed
BITS_PER_LONG (otherwise the shift operations are undefined).

Similarly, the value must not be negative (but -1 must be
permitted, as that's the value used to distinguish the case of
the fine grained flushing being disabled).

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Alex Shi <alex.shi@intel.com>
Link: http://lkml.kernel.org/r/5049B65C020000780009990C@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Jan Beulich 2012-09-07 07:54:52 +01:00 • committed by Ingo Molnar

parent 057237bb35

commit d4c9dbc61f

1 changed files with 1 additions and 1 deletions

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arch/x86/mm/tlb.c

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