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| author | Christoph Hellwig <hch@lst.de> | 2016-12-12 16:44:20 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-12 18:55:08 -0800 |
| commit | 5803ed292e63a1bf00722d6655d0229794607183 (patch) | |
| tree | a1af7460c7c148a266fd04ea1e332cb8d0b0bb37 /mm/vmalloc.c | |
| parent | 8d5341a6260a59cf15c4ae0efbf0bcd8e1b8a6bb (diff) | |
| download | linux-0-day-5803ed292e63a1bf00722d6655d0229794607183.tar.gz linux-0-day-5803ed292e63a1bf00722d6655d0229794607183.tar.xz | |
mm: mark all calls into the vmalloc subsystem as potentially sleeping
We will take a sleeping lock in later in this series, so this adds the
proper safeguards.
Link: http://lkml.kernel.org/r/1479474236-4139-9-git-send-email-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Jisheng Zhang <jszhang@marvell.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Joel Fernandes <joelaf@google.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: John Dias <joaodias@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmalloc.c')
| -rw-r--r-- | mm/vmalloc.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 4ac776f10ad1b..3308007d84270 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -365,7 +365,7 @@ static struct vmap_area *alloc_vmap_area(unsigned long size, BUG_ON(offset_in_page(size)); BUG_ON(!is_power_of_2(align)); - might_sleep_if(gfpflags_allow_blocking(gfp_mask)); + might_sleep(); va = kmalloc_node(sizeof(struct vmap_area), gfp_mask & GFP_RECLAIM_MASK, node); @@ -1037,6 +1037,8 @@ void vm_unmap_aliases(void) if (unlikely(!vmap_initialized)) return; + might_sleep(); + for_each_possible_cpu(cpu) { struct vmap_block_queue *vbq = &per_cpu(vmap_block_queue, cpu); struct vmap_block *vb; @@ -1080,6 +1082,7 @@ void vm_unmap_ram(const void *mem, unsigned int count) unsigned long addr = (unsigned long)mem; struct vmap_area *va; + might_sleep(); BUG_ON(!addr); BUG_ON(addr < VMALLOC_START); BUG_ON(addr > VMALLOC_END); @@ -1431,6 +1434,8 @@ struct vm_struct *remove_vm_area(const void *addr) { struct vmap_area *va; + might_sleep(); + va = find_vmap_area((unsigned long)addr); if (va && va->flags & VM_VM_AREA) { struct vm_struct *vm = va->vm; |