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mm/hmm: replace hmm_update with mmu_notifier_range

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The hmm_mirror_ops callback function sync_cpu_device_pagetables() passes a
struct hmm_update which is a simplified version of struct
mmu_notifier_range. This is unnecessary so replace hmm_update with
mmu_notifier_range directly.

Link: https://lore.kernel.org/r/20190726005650.2566-2-rcampbell@nvidia.com
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Reviewed: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
[jgg: white space tuning]
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Ralph Campbell
2019-07-25 17:56:44 -07:00
committed by Jason Gunthorpe
parent e709accc76
commit 1f96180792
4 changed files with 20 additions and 45 deletions
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34
include/linux/hmm.h
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@@ -340,29 +340,6 @@ static inline uint64_t hmm_device_entry_from_pfn(const struct hmm_range *range,
struct hmm_mirror;
/*
* enum hmm_update_event - type of update
* @HMM_UPDATE_INVALIDATE: invalidate range (no indication as to why)
*/
enum hmm_update_event {
HMM_UPDATE_INVALIDATE,
};
/*
* struct hmm_update - HMM update information for callback
*
* @start: virtual start address of the range to update
* @end: virtual end address of the range to update
* @event: event triggering the update (what is happening)
* @blockable: can the callback block/sleep ?
*/
struct hmm_update {
unsigned long start;
unsigned long end;
enum hmm_update_event event;
bool blockable;
};
/*
* struct hmm_mirror_ops - HMM mirror device operations callback
*
@@ -383,9 +360,9 @@ struct hmm_mirror_ops {
/* sync_cpu_device_pagetables() - synchronize page tables
*
* @mirror: pointer to struct hmm_mirror
* @update: update information (see struct hmm_update)
* Return: -EAGAIN if update.blockable false and callback need to
* block, 0 otherwise.
* @update: update information (see struct mmu_notifier_range)
* Return: -EAGAIN if mmu_notifier_range_blockable(update) is false
* and callback needs to block, 0 otherwise.
*
* This callback ultimately originates from mmu_notifiers when the CPU
* page table is updated. The device driver must update its page table
@@ -396,8 +373,9 @@ struct hmm_mirror_ops {
* page tables are completely updated (TLBs flushed, etc); this is a
* synchronous call.
*/
int (*sync_cpu_device_pagetables)(struct hmm_mirror *mirror,
const struct hmm_update *update);
int (*sync_cpu_device_pagetables)(
struct hmm_mirror *mirror,
const struct mmu_notifier_range *update);
};
/*