diff options
author | Jason Gunthorpe <jgg@mellanox.com> | 2019-08-06 20:15:48 -0300 |
---|---|---|
committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-08-21 20:58:19 -0300 |
commit | c96245148c1ec7af086da322481bf4119d1141d3 (patch) | |
tree | 0c29ccaebc45095bff68efd849361779d637f72f | |
parent | 47f725ee7b5f5cae1f83512961bcf8b41a7a5794 (diff) | |
download | linux-c96245148c1ec7af086da322481bf4119d1141d3.tar.bz2 |
mm/mmu_notifiers: remove unregister_no_release
mmu_notifier_unregister_no_release() and mmu_notifier_call_srcu() no
longer have any users, they have all been converted to use
mmu_notifier_put().
So delete this difficult to use interface.
Link: https://lore.kernel.org/r/20190806231548.25242-12-jgg@ziepe.ca
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ralph Campbell <rcampbell@nvidia.com>
Tested-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
-rw-r--r-- | include/linux/mmu_notifier.h | 5 | ||||
-rw-r--r-- | mm/mmu_notifier.c | 31 |
2 files changed, 0 insertions, 36 deletions
diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h index 31aa971315a1..52929e5ef708 100644 --- a/include/linux/mmu_notifier.h +++ b/include/linux/mmu_notifier.h @@ -271,8 +271,6 @@ extern int __mmu_notifier_register(struct mmu_notifier *mn, struct mm_struct *mm); extern void mmu_notifier_unregister(struct mmu_notifier *mn, struct mm_struct *mm); -extern void mmu_notifier_unregister_no_release(struct mmu_notifier *mn, - struct mm_struct *mm); extern void __mmu_notifier_mm_destroy(struct mm_struct *mm); extern void __mmu_notifier_release(struct mm_struct *mm); extern int __mmu_notifier_clear_flush_young(struct mm_struct *mm, @@ -513,9 +511,6 @@ static inline void mmu_notifier_range_init(struct mmu_notifier_range *range, set_pte_at(___mm, ___address, __ptep, ___pte); \ }) -extern void mmu_notifier_call_srcu(struct rcu_head *rcu, - void (*func)(struct rcu_head *rcu)); - #else /* CONFIG_MMU_NOTIFIER */ struct mmu_notifier_range { diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c index d76ea27e2bbb..3ebdc748b168 100644 --- a/mm/mmu_notifier.c +++ b/mm/mmu_notifier.c @@ -22,18 +22,6 @@ DEFINE_STATIC_SRCU(srcu); /* - * This function allows mmu_notifier::release callback to delay a call to - * a function that will free appropriate resources. The function must be - * quick and must not block. - */ -void mmu_notifier_call_srcu(struct rcu_head *rcu, - void (*func)(struct rcu_head *rcu)) -{ - call_srcu(&srcu, rcu, func); -} -EXPORT_SYMBOL_GPL(mmu_notifier_call_srcu); - -/* * This function can't run concurrently against mmu_notifier_register * because mm->mm_users > 0 during mmu_notifier_register and exit_mmap * runs with mm_users == 0. Other tasks may still invoke mmu notifiers @@ -455,25 +443,6 @@ void mmu_notifier_unregister(struct mmu_notifier *mn, struct mm_struct *mm) } EXPORT_SYMBOL_GPL(mmu_notifier_unregister); -/* - * Same as mmu_notifier_unregister but no callback and no srcu synchronization. - */ -void mmu_notifier_unregister_no_release(struct mmu_notifier *mn, - struct mm_struct *mm) -{ - spin_lock(&mm->mmu_notifier_mm->lock); - /* - * Can not use list_del_rcu() since __mmu_notifier_release - * can delete it before we hold the lock. - */ - hlist_del_init_rcu(&mn->hlist); - spin_unlock(&mm->mmu_notifier_mm->lock); - - BUG_ON(atomic_read(&mm->mm_count) <= 0); - mmdrop(mm); -} -EXPORT_SYMBOL_GPL(mmu_notifier_unregister_no_release); - static void mmu_notifier_free_rcu(struct rcu_head *rcu) { struct mmu_notifier *mn = container_of(rcu, struct mmu_notifier, rcu); |