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authorClemens Ladisch <clemens@ladisch.de>2014-11-16 21:08:49 +0100
committerStefan Richter <stefanr@s5r6.in-berlin.de>2014-11-19 11:57:50 +0100
commit51b04d59c27430a57c347b55478415c342009035 (patch)
tree498e6a03b0c238e90b1587362f5b1e714ec30890 /drivers/firewire
parentfc14f9c1272f62c3e8d01300f52467c0d9af50f9 (diff)
firewire: ohci: replace vm_map_ram() with vmap()
vm_map_ram() is intended for short-lived objects, so using it for the AR buffers could fragment address space, especially on a 32-bit machine. For an allocation that lives as long as the device, vmap() is the better choice. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/ohci.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index a66a3217f1d9..aff9018d0658 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -689,8 +689,7 @@ static void ar_context_release(struct ar_context *ctx)
{
unsigned int i;
- if (ctx->buffer)
- vm_unmap_ram(ctx->buffer, AR_BUFFERS + AR_WRAPAROUND_PAGES);
+ vunmap(ctx->buffer);
for (i = 0; i < AR_BUFFERS; i++)
if (ctx->pages[i]) {
@@ -1018,8 +1017,7 @@ static int ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci,
pages[i] = ctx->pages[i];
for (i = 0; i < AR_WRAPAROUND_PAGES; i++)
pages[AR_BUFFERS + i] = ctx->pages[i];
- ctx->buffer = vm_map_ram(pages, AR_BUFFERS + AR_WRAPAROUND_PAGES,
- -1, PAGE_KERNEL);
+ ctx->buffer = vmap(pages, ARRAY_SIZE(pages), VM_MAP, PAGE_KERNEL);
if (!ctx->buffer)
goto out_of_memory;

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