diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2011-07-12 11:39:36 +0200 |
|---|---|---|
| committer | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2021-08-16 10:41:52 +0200 |
| commit | 9584df5e521f3b4e0a2063d7878762f7aa54fca5 (patch) | |
| tree | a510a4115544c03db174a0ea7fc63e172fa14407 | |
| parent | e30e465489cff96db95686388bdf7765fd7b0999 (diff) | |
| download | linux-rt-devel-9584df5e521f3b4e0a2063d7878762f7aa54fca5.tar.gz | |
mm/vmalloc: Another preempt disable region which sucks
Notice: this object is not reachable from any branch.
Avoid the preempt disable version of get_cpu_var(). The inner-lock should
provide enough serialisation.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Notice: this object is not reachable from any branch.
| -rw-r--r-- | mm/vmalloc.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index d5cd528051496..cf2d9abdd9594 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1847,7 +1847,7 @@ static void *new_vmap_block(unsigned int order, gfp_t gfp_mask) struct vmap_block *vb; struct vmap_area *va; unsigned long vb_idx; - int node, err; + int node, err, cpu; void *vaddr; node = numa_node_id(); @@ -1884,11 +1884,12 @@ static void *new_vmap_block(unsigned int order, gfp_t gfp_mask) return ERR_PTR(err); } - vbq = &get_cpu_var(vmap_block_queue); + cpu = get_cpu_light(); + vbq = this_cpu_ptr(&vmap_block_queue); spin_lock(&vbq->lock); list_add_tail_rcu(&vb->free_list, &vbq->free); spin_unlock(&vbq->lock); - put_cpu_var(vmap_block_queue); + put_cpu_light(); return vaddr; } @@ -1953,6 +1954,7 @@ static void *vb_alloc(unsigned long size, gfp_t gfp_mask) struct vmap_block *vb; void *vaddr = NULL; unsigned int order; + int cpu; BUG_ON(offset_in_page(size)); BUG_ON(size > PAGE_SIZE*VMAP_MAX_ALLOC); @@ -1967,7 +1969,8 @@ static void *vb_alloc(unsigned long size, gfp_t gfp_mask) order = get_order(size); rcu_read_lock(); - vbq = &get_cpu_var(vmap_block_queue); + cpu = get_cpu_light(); + vbq = this_cpu_ptr(&vmap_block_queue); list_for_each_entry_rcu(vb, &vbq->free, free_list) { unsigned long pages_off; @@ -1990,7 +1993,7 @@ static void *vb_alloc(unsigned long size, gfp_t gfp_mask) break; } - put_cpu_var(vmap_block_queue); + put_cpu_light(); rcu_read_unlock(); /* Allocate new block if nothing was found */ |