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a033ab4fec
Function ubi_update_fastmap could be called in IO context, for example:
ubifs_writepage
do_writepage
ubifs_jnl_write_data
write_head
ubifs_wbuf_write_nolock
ubifs_leb_write
ubi_leb_write
ubi_eba_write_leb
try_write_vid_and_data
ubi_wl_get_peb
ubi_update_fastmap
erase_block
So it's better to allocate memory with GFP_NOFS mode, in case waiting
page writeback(dead loop).
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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| README | ||
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.
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.