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| author | Paul Moore <pmoore@redhat.com> | 2014-01-28 14:44:16 -0500 |
|---|---|---|
| committer | Paul Moore <pmoore@redhat.com> | 2014-02-05 10:39:48 -0500 |
| commit | 825e587af2e90e9b953849f3347a01d8f383d577 (patch) | |
| tree | e48942a05882da47544e179c6a0c920e00137a6a /lib/genalloc.c | |
| parent | 8ed814602876bec9bad2649ca17f34b499357a1c (diff) | |
| parent | d8ec26d7f8287f5788a494f56e8814210f0e64be (diff) | |
Merge tag 'v3.13' into stable-3.14
Linux 3.13
Conflicts:
security/selinux/hooks.c
Trivial merge issue in selinux_inet_conn_request() likely due to me
including patches that I sent to the stable folks in my next tree
resulting in the patch hitting twice (I think). Thankfully it was an
easy fix this time, but regardless, lesson learned, I will not do that
again.
Diffstat (limited to 'lib/genalloc.c')
| -rw-r--r-- | lib/genalloc.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/genalloc.c b/lib/genalloc.c index 26cf20be72b..dda31168844 100644 --- a/lib/genalloc.c +++ b/lib/genalloc.c @@ -313,6 +313,34 @@ retry: EXPORT_SYMBOL(gen_pool_alloc); /** + * gen_pool_dma_alloc - allocate special memory from the pool for DMA usage + * @pool: pool to allocate from + * @size: number of bytes to allocate from the pool + * @dma: dma-view physical address + * + * Allocate the requested number of bytes from the specified pool. + * Uses the pool allocation function (with first-fit algorithm by default). + * Can not be used in NMI handler on architectures without + * NMI-safe cmpxchg implementation. + */ +void *gen_pool_dma_alloc(struct gen_pool *pool, size_t size, dma_addr_t *dma) +{ + unsigned long vaddr; + + if (!pool) + return NULL; + + vaddr = gen_pool_alloc(pool, size); + if (!vaddr) + return NULL; + + *dma = gen_pool_virt_to_phys(pool, vaddr); + + return (void *)vaddr; +} +EXPORT_SYMBOL(gen_pool_dma_alloc); + +/** * gen_pool_free - free allocated special memory back to the pool * @pool: pool to free to * @addr: starting address of memory to free back to pool |