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8af7024239917e2fb7b73d34751d430a5de948f2
The ion allocates memory defaultly with memset to zero, userspace should do cache sync before read/wirte after map. But the userspace always not to do that. This patch supports to do force sync for memory allocated first time from page pools with memset zero. Change-Id: I8a65b1a3259d315459a0489f9c51ab0855957a70 Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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