diff options
| author | Chris Metcalf <cmetcalf@tilera.com> | 2012-03-29 15:50:08 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2012-04-02 12:13:22 -0400 |
| commit | 719ea79e330c5e1a17fb7e4cf352a81e4c84cff5 (patch) | |
| tree | 08fc6a29a0430599b9e91e9e87945b0b6eb2ef6a /arch/tile/kernel/setup.c | |
| parent | 5f220704127ae70db519fabbda4ece649eadac7f (diff) | |
arch/tile: fix up locking in pgtable.c slightly
We should be holding the init_mm.page_table_lock in shatter_huge_page()
since we are modifying the kernel page tables. Then, only if we are
walking the other root page tables to update them, do we want to take
the pgd_lock.
Add a comment about taking the pgd_lock that we always do it with
interrupts disabled and therefore are not at risk from the tlbflush
IPI deadlock as is seen on x86.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/kernel/setup.c')
0 files changed, 0 insertions, 0 deletions