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author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-10-08 13:01:39 -0700 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-10-09 14:25:19 +0200 |
commit | eefb47f6a1e855653d275cb90592a3587ea93a09 (patch) | |
tree | f6b5b611a8900d975874ab0ac9e7f5df935ef862 /drivers/accessibility/braille/braille_console.c | |
parent | d19c8e516e0a17e049bcfbe96f86e040254ddf14 (diff) |
xen: use spin_lock_nest_lock when pinning a pagetable
When pinning/unpinning a pagetable with split pte locks, we can end up
holding multiple pte locks at once (we need to hold the locks while
there's a pending batched hypercall affecting the pte page). Because
all the pte locks are in the same lock class, lockdep thinks that
we're potentially taking a lock recursively.
This warning is spurious because we always take the pte locks while
holding mm->page_table_lock. lockdep now has spin_lock_nest_lock to
express this kind of dominant lock use, so use it here so that lockdep
knows what's going on.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/accessibility/braille/braille_console.c')
0 files changed, 0 insertions, 0 deletions