diff options
Diffstat (limited to 'arch/powerpc/mm/mmu_context_book3s64.c')
| -rw-r--r-- | arch/powerpc/mm/mmu_context_book3s64.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/mm/mmu_context_book3s64.c b/arch/powerpc/mm/mmu_context_book3s64.c index fd0bc6db2dcd..7bc5b63034db 100644 --- a/arch/powerpc/mm/mmu_context_book3s64.c +++ b/arch/powerpc/mm/mmu_context_book3s64.c @@ -57,6 +57,22 @@ again: return index; } +void hash__reserve_context_id(int id) +{ + int rc, result = 0; + + do { + if (!ida_pre_get(&mmu_context_ida, GFP_KERNEL)) + break; + + spin_lock(&mmu_context_lock); + rc = ida_get_new_above(&mmu_context_ida, id, &result); + spin_unlock(&mmu_context_lock); + } while (rc == -EAGAIN); + + WARN(result != id, "mmu: Failed to reserve context id %d (rc %d)\n", id, result); +} + int hash__alloc_context_id(void) { unsigned long max; |