diff options
| author | Michael Ellerman <mpe@ellerman.id.au> | 2017-03-29 22:10:45 +1100 |
|---|---|---|
| committer | Michal Hocko <mhocko@suse.com> | 2017-05-19 09:14:48 +0200 |
| commit | 5ac2542015a69d9591e638fbc4f4c3b7a3208e40 (patch) | |
| tree | 0dd3326ace013f65d53d6ed69b999b22e57663df | |
| parent | 9832ad385729b1b3af5e78d56834ebfa2fb9e651 (diff) | |
powerpc/mm/hash: Pull hash constants into hash__alloc_context_id()
The min and max context id values used in alloc_context_id() are
currently the right values for use on hash, and happen to also be safe
for use on radix.
But we need to change that in a subsequent patch, so make the min/max
ids parameters and pull the hash values into hsah__alloc_context_id().
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
(cherry picked from commit c1ff840d21208aff8cea18c0ae052c536d74f53e)
| -rw-r--r-- | arch/powerpc/mm/mmu_context_book3s64.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/arch/powerpc/mm/mmu_context_book3s64.c b/arch/powerpc/mm/mmu_context_book3s64.c index 650a498b1de9..981c3b02e46a 100644 --- a/arch/powerpc/mm/mmu_context_book3s64.c +++ b/arch/powerpc/mm/mmu_context_book3s64.c @@ -30,17 +30,16 @@ static DEFINE_SPINLOCK(mmu_context_lock); static DEFINE_IDA(mmu_context_ida); -static int __init_new_context(void) +static int alloc_context_id(int min_id, int max_id) { - int index; - int err; + int index, err; again: if (!ida_pre_get(&mmu_context_ida, GFP_KERNEL)) return -ENOMEM; spin_lock(&mmu_context_lock); - err = ida_get_new_above(&mmu_context_ida, 1, &index); + err = ida_get_new_above(&mmu_context_ida, min_id, &index); spin_unlock(&mmu_context_lock); if (err == -EAGAIN) @@ -48,7 +47,7 @@ again: else if (err) return err; - if (index > MAX_USER_CONTEXT) { + if (index > max_id) { spin_lock(&mmu_context_lock); ida_remove(&mmu_context_ida, index); spin_unlock(&mmu_context_lock); @@ -60,7 +59,7 @@ again: int hash__alloc_context_id(void) { - return __init_new_context(); + return alloc_context_id(1, MAX_USER_CONTEXT); } EXPORT_SYMBOL_GPL(hash__alloc_context_id); @@ -80,7 +79,7 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { int index; - index = __init_new_context(); + index = hash__alloc_context_id(); if (index < 0) return index; |