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Merge branch 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax

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Pull IDA updates from Matthew Wilcox:
 "A better IDA API:

      id = ida_alloc(ida, GFP_xxx);
      ida_free(ida, id);

  rather than the cumbersome ida_simple_get(), ida_simple_remove().

  The new IDA API is similar to ida_simple_get() but better named.  The
  internal restructuring of the IDA code removes the bitmap
  preallocation nonsense.

  I hope the net -200 lines of code is convincing"

* 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax: (29 commits)
  ida: Change ida_get_new_above to return the id
  ida: Remove old API
  test_ida: check_ida_destroy and check_ida_alloc
  test_ida: Convert check_ida_conv to new API
  test_ida: Move ida_check_max
  test_ida: Move ida_check_leaf
  idr-test: Convert ida_check_nomem to new API
  ida: Start new test_ida module
  target/iscsi: Allocate session IDs from an IDA
  iscsi target: fix session creation failure handling
  drm/vmwgfx: Convert to new IDA API
  dmaengine: Convert to new IDA API
  ppc: Convert vas ID allocation to new IDA API
  media: Convert entity ID allocation to new IDA API
  ppc: Convert mmu context allocation to new IDA API
  Convert net_namespace to new IDA API
  cb710: Convert to new IDA API
  rsxx: Convert to new IDA API
  osd: Convert to new IDA API
  sd: Convert to new IDA API
  ...
This commit is contained in:
Linus Torvalds
2018-08-26 11:48:42 -07:00
parent c4726e774e 1df8951902
commit aba16dc5cf
28 changed files with 486 additions and 680 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
arch/powerpc/mm/mmu_context_book3s64.c
View File

@@ -26,48 +26,16 @@
#include <asm/mmu_context.h>
#include <asm/pgalloc.h>
static DEFINE_SPINLOCK(mmu_context_lock);
static DEFINE_IDA(mmu_context_ida);
static int alloc_context_id(int min_id, int max_id)
{
int index, err;
again:
if (!ida_pre_get(&mmu_context_ida, GFP_KERNEL))
return -ENOMEM;
spin_lock(&mmu_context_lock);
err = ida_get_new_above(&mmu_context_ida, min_id, &index);
spin_unlock(&mmu_context_lock);
if (err == -EAGAIN)
goto again;
else if (err)
return err;
if (index > max_id) {
spin_lock(&mmu_context_lock);
ida_remove(&mmu_context_ida, index);
spin_unlock(&mmu_context_lock);
return -ENOMEM;
}
return index;
return ida_alloc_range(&mmu_context_ida, min_id, max_id, GFP_KERNEL);
}
void hash__reserve_context_id(int id)
{
int rc, result = 0;
do {
if (!ida_pre_get(&mmu_context_ida, GFP_KERNEL))
break;
spin_lock(&mmu_context_lock);
rc = ida_get_new_above(&mmu_context_ida, id, &result);
spin_unlock(&mmu_context_lock);
} while (rc == -EAGAIN);
int result = ida_alloc_range(&mmu_context_ida, id, id, GFP_KERNEL);
WARN(result != id, "mmu: Failed to reserve context id %d (rc %d)\n", id, result);
}
@@ -172,9 +140,7 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
void __destroy_context(int context_id)
{
spin_lock(&mmu_context_lock);
ida_remove(&mmu_context_ida, context_id);
spin_unlock(&mmu_context_lock);
ida_free(&mmu_context_ida, context_id);
}
EXPORT_SYMBOL_GPL(__destroy_context);
@@ -182,13 +148,11 @@ static void destroy_contexts(mm_context_t *ctx)
{
int index, context_id;
spin_lock(&mmu_context_lock);
for (index = 0; index < ARRAY_SIZE(ctx->extended_id); index++) {
context_id = ctx->extended_id[index];
if (context_id)
ida_remove(&mmu_context_ida, context_id);
ida_free(&mmu_context_ida, context_id);
}
spin_unlock(&mmu_context_lock);
}
static void pte_frag_destroy(void *pte_frag)