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iommu: Delete split_and_remove_iova() 

Function split_and_remove_iova() has not been referenced since commit
e70b081c6f ("iommu/vt-d: Remove IOVA handling code from the non-dma_ops
path"), so delete it.

Signed-off-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/1607020492-189471-2-git-send-email-john.garry@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
John Garry 2020-12-04 02:34:50 +08:00 committed by Will Deacon
parent 3a651b3a27
commit 2f24dfb712
2 changed files with 0 additions and 51 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/iommu/iova.c
View File

@ -742,47 +742,6 @@ copy_reserved_iova(struct iova_domain *from, struct iova_domain *to)
}
EXPORT_SYMBOL_GPL(copy_reserved_iova);
struct iova *
split_and_remove_iova(struct iova_domain *iovad, struct iova *iova,
unsigned long pfn_lo, unsigned long pfn_hi)
{
unsigned long flags;
struct iova *prev = NULL, *next = NULL;
spin_lock_irqsave(&iovad->iova_rbtree_lock, flags);
if (iova->pfn_lo < pfn_lo) {
prev = alloc_and_init_iova(iova->pfn_lo, pfn_lo - 1);
if (prev == NULL)
goto error;
}
if (iova->pfn_hi > pfn_hi) {
next = alloc_and_init_iova(pfn_hi + 1, iova->pfn_hi);
if (next == NULL)
goto error;
}
__cached_rbnode_delete_update(iovad, iova);
rb_erase(&iova->node, &iovad->rbroot);
if (prev) {
iova_insert_rbtree(&iovad->rbroot, prev, NULL);
iova->pfn_lo = pfn_lo;
}
if (next) {
iova_insert_rbtree(&iovad->rbroot, next, NULL);
iova->pfn_hi = pfn_hi;
}
spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags);
return iova;
error:
spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags);
if (prev)
free_iova_mem(prev);
return NULL;
}
/*
* Magazine caches for IOVA ranges. For an introduction to magazines,
* see the USENIX 2001 paper "Magazines and Vmem: Extending the Slab

10
include/linux/iova.h
View File

@ -160,8 +160,6 @@ int init_iova_flush_queue(struct iova_domain *iovad,
iova_flush_cb flush_cb, iova_entry_dtor entry_dtor);
struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn);
void put_iova_domain(struct iova_domain *iovad);
struct iova *split_and_remove_iova(struct iova_domain *iovad,
struct iova *iova, unsigned long pfn_lo, unsigned long pfn_hi);
void free_cpu_cached_iovas(unsigned int cpu, struct iova_domain *iovad);
#else
static inline int iova_cache_get(void)
@ -258,14 +256,6 @@ static inline void put_iova_domain(struct iova_domain *iovad)
{
}
static inline struct iova *split_and_remove_iova(struct iova_domain *iovad,
struct iova *iova,
unsigned long pfn_lo,
unsigned long pfn_hi)
{
return NULL;
}
static inline void free_cpu_cached_iovas(unsigned int cpu,
struct iova_domain *iovad)
{