gpu: ion: Modify zeroing code so it only allocates address space once

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vmap/vunmap spend a significant amount of time allocating the
address space to map into.  Rather than allocating address space
for each page, instead allocate once for the entire allocation
and then just map and unmap each page into that address space.

Signed-off-by: Rebecca Schultz Zavin <rschultz@google.com>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Rebecca Schultz Zavin 2013-12-13 14:24:31 -08:00 • committed by Greg Kroah-Hartman

parent 2bb9f5034e

commit 77cbe828a1

1 changed files with 21 additions and 7 deletions

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drivers/staging/android/ion/ion_system_heap.c

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