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mm/mmu_notifier: use structure for invalidate_range_start/end calls v2

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To avoid having to change many call sites everytime we want to add a
parameter use a structure to group all parameters for the mmu_notifier
invalidate_range_start/end cakks.  No functional changes with this patch.

[akpm@linux-foundation.org: coding style fixes]
Link: http://lkml.kernel.org/r/20181205053628.3210-3-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Jan Kara <jack@suse.cz>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Ross Zwisler <zwisler@kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krcmar <rkrcmar@redhat.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Felix Kuehling <felix.kuehling@amd.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
From: Jérôme Glisse <jglisse@redhat.com>
Subject: mm/mmu_notifier: use structure for invalidate_range_start/end calls v3

fix build warning in migrate.c when CONFIG_MMU_NOTIFIER=n

Link: http://lkml.kernel.org/r/20181213171330.8489-3-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jérôme Glisse
2018-12-28 00:38:09 -08:00
committed by Linus Torvalds
parent 5d6527a784
commit ac46d4f3c4
17 changed files with 262 additions and 250 deletions
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37
mm/mmu_notifier.c
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@@ -167,28 +167,20 @@ void __mmu_notifier_change_pte(struct mm_struct *mm, unsigned long address,
srcu_read_unlock(&srcu, id);
}
int __mmu_notifier_invalidate_range_start(struct mm_struct *mm,
unsigned long start, unsigned long end,
bool blockable)
int __mmu_notifier_invalidate_range_start(struct mmu_notifier_range *range)
{
struct mmu_notifier_range _range, *range = &_range;
struct mmu_notifier *mn;
int ret = 0;
int id;
range->blockable = blockable;
range->start = start;
range->end = end;
range->mm = mm;
id = srcu_read_lock(&srcu);
hlist_for_each_entry_rcu(mn, &mm->mmu_notifier_mm->list, hlist) {
hlist_for_each_entry_rcu(mn, &range->mm->mmu_notifier_mm->list, hlist) {
if (mn->ops->invalidate_range_start) {
int _ret = mn->ops->invalidate_range_start(mn, range);
if (_ret) {
pr_info("%pS callback failed with %d in %sblockable context.\n",
mn->ops->invalidate_range_start, _ret,
!blockable ? "non-" : "");
mn->ops->invalidate_range_start, _ret,
!range->blockable ? "non-" : "");
ret = _ret;
}
}
@@ -199,27 +191,14 @@ int __mmu_notifier_invalidate_range_start(struct mm_struct *mm,
}
EXPORT_SYMBOL_GPL(__mmu_notifier_invalidate_range_start);
void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
unsigned long start,
unsigned long end,
void __mmu_notifier_invalidate_range_end(struct mmu_notifier_range *range,
bool only_end)
{
struct mmu_notifier_range _range, *range = &_range;
struct mmu_notifier *mn;
int id;
/*
* The end call back will never be call if the start refused to go
* through because of blockable was false so here assume that we
* can block.
*/
range->blockable = true;
range->start = start;
range->end = end;
range->mm = mm;
id = srcu_read_lock(&srcu);
hlist_for_each_entry_rcu(mn, &mm->mmu_notifier_mm->list, hlist) {
hlist_for_each_entry_rcu(mn, &range->mm->mmu_notifier_mm->list, hlist) {
/*
* Call invalidate_range here too to avoid the need for the
* subsystem of having to register an invalidate_range_end
@@ -234,7 +213,9 @@ void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
* already happen under page table lock.
*/
if (!only_end && mn->ops->invalidate_range)
mn->ops->invalidate_range(mn, mm, start, end);
mn->ops->invalidate_range(mn, range->mm,
range->start,
range->end);
if (mn->ops->invalidate_range_end)
mn->ops->invalidate_range_end(mn, range);
}