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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
Download Patch File Download Diff File Expand all files Collapse all files

6
include/linux/mm.h
View File

@@ -1451,6 +1451,8 @@ struct mm_walk {
void *private;
};
struct mmu_notifier_range;
int walk_page_range(unsigned long addr, unsigned long end,
struct mm_walk *walk);
int walk_page_vma(struct vm_area_struct *vma, struct mm_walk *walk);
@@ -1459,8 +1461,8 @@ void free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
int copy_page_range(struct mm_struct *dst, struct mm_struct *src,
struct vm_area_struct *vma);
int follow_pte_pmd(struct mm_struct *mm, unsigned long address,
unsigned long *start, unsigned long *end,
pte_t **ptepp, pmd_t **pmdpp, spinlock_t **ptlp);
struct mmu_notifier_range *range,
pte_t **ptepp, pmd_t **pmdpp, spinlock_t **ptlp);
int follow_pfn(struct vm_area_struct *vma, unsigned long address,
unsigned long *pfn);
int follow_phys(struct vm_area_struct *vma, unsigned long address,

87
include/linux/mmu_notifier.h
View File

@@ -220,11 +220,8 @@ extern int __mmu_notifier_test_young(struct mm_struct *mm,
unsigned long address);
extern void __mmu_notifier_change_pte(struct mm_struct *mm,
unsigned long address, pte_t pte);
extern int __mmu_notifier_invalidate_range_start(struct mm_struct *mm,
unsigned long start, unsigned long end,
bool blockable);
extern void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
unsigned long start, unsigned long end,
extern int __mmu_notifier_invalidate_range_start(struct mmu_notifier_range *r);
extern void __mmu_notifier_invalidate_range_end(struct mmu_notifier_range *r,
bool only_end);
extern void __mmu_notifier_invalidate_range(struct mm_struct *mm,
unsigned long start, unsigned long end);
@@ -268,33 +265,37 @@ static inline void mmu_notifier_change_pte(struct mm_struct *mm,
__mmu_notifier_change_pte(mm, address, pte);
}
static inline void mmu_notifier_invalidate_range_start(struct mm_struct *mm,
unsigned long start, unsigned long end)
static inline void
mmu_notifier_invalidate_range_start(struct mmu_notifier_range *range)
{
if (mm_has_notifiers(mm))
__mmu_notifier_invalidate_range_start(mm, start, end, true);
if (mm_has_notifiers(range->mm)) {
range->blockable = true;
__mmu_notifier_invalidate_range_start(range);
}
}
static inline int mmu_notifier_invalidate_range_start_nonblock(struct mm_struct *mm,
unsigned long start, unsigned long end)
static inline int
mmu_notifier_invalidate_range_start_nonblock(struct mmu_notifier_range *range)
{
if (mm_has_notifiers(mm))
return __mmu_notifier_invalidate_range_start(mm, start, end, false);
if (mm_has_notifiers(range->mm)) {
range->blockable = false;
return __mmu_notifier_invalidate_range_start(range);
}
return 0;
}
static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm,
unsigned long start, unsigned long end)
static inline void
mmu_notifier_invalidate_range_end(struct mmu_notifier_range *range)
{
if (mm_has_notifiers(mm))
__mmu_notifier_invalidate_range_end(mm, start, end, false);
if (mm_has_notifiers(range->mm))
__mmu_notifier_invalidate_range_end(range, false);
}
static inline void mmu_notifier_invalidate_range_only_end(struct mm_struct *mm,
unsigned long start, unsigned long end)
static inline void
mmu_notifier_invalidate_range_only_end(struct mmu_notifier_range *range)
{
if (mm_has_notifiers(mm))
__mmu_notifier_invalidate_range_end(mm, start, end, true);
if (mm_has_notifiers(range->mm))
__mmu_notifier_invalidate_range_end(range, true);
}
static inline void mmu_notifier_invalidate_range(struct mm_struct *mm,
@@ -315,6 +316,17 @@ static inline void mmu_notifier_mm_destroy(struct mm_struct *mm)
__mmu_notifier_mm_destroy(mm);
}
static inline void mmu_notifier_range_init(struct mmu_notifier_range *range,
struct mm_struct *mm,
unsigned long start,
unsigned long end)
{
range->mm = mm;
range->start = start;
range->end = end;
}
#define ptep_clear_flush_young_notify(__vma, __address, __ptep) \
({ \
int __young; \
@@ -427,6 +439,23 @@ extern void mmu_notifier_call_srcu(struct rcu_head *rcu,
#else /* CONFIG_MMU_NOTIFIER */
struct mmu_notifier_range {
unsigned long start;
unsigned long end;
};
static inline void _mmu_notifier_range_init(struct mmu_notifier_range *range,
unsigned long start,
unsigned long end)
{
range->start = start;
range->end = end;
}
#define mmu_notifier_range_init(range, mm, start, end) \
_mmu_notifier_range_init(range, start, end)
static inline int mm_has_notifiers(struct mm_struct *mm)
{
return 0;
@@ -454,24 +483,24 @@ static inline void mmu_notifier_change_pte(struct mm_struct *mm,
{
}
static inline void mmu_notifier_invalidate_range_start(struct mm_struct *mm,
unsigned long start, unsigned long end)
static inline void
mmu_notifier_invalidate_range_start(struct mmu_notifier_range *range)
{
}
static inline int mmu_notifier_invalidate_range_start_nonblock(struct mm_struct *mm,
unsigned long start, unsigned long end)
static inline int
mmu_notifier_invalidate_range_start_nonblock(struct mmu_notifier_range *range)
{
return 0;
}
static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm,
unsigned long start, unsigned long end)
static inline
void mmu_notifier_invalidate_range_end(struct mmu_notifier_range *range)
{
}
static inline void mmu_notifier_invalidate_range_only_end(struct mm_struct *mm,
unsigned long start, unsigned long end)
static inline void
mmu_notifier_invalidate_range_only_end(struct mmu_notifier_range *range)
{
}