54dd200c5a
This commit contains 3 modifications:
1. Convert the type of jiffies_scan_wait to "unsigned long".
2. Use READ/WRITE_ONCE() for accessing "jiffies_scan_wait".
3. Fix the possible wrong memory scanning period. If you set a large
memory scanning period like blow, then the "secs" variable will be
non-zero, however the value of "jiffies_scan_wait" will be zero.
echo "scan=0x10000000" > /sys/kernel/debug/kmemleak
It is because the type of the msecs_to_jiffies()'s parameter is "unsigned
int", and the "secs * 1000" is larger than its max value. This in turn
leads a unexpected jiffies_scan_wait, maybe zero. We corret it by
replacing kstrtoul() with kstrtouint(), and check the msecs to prevent it
larger than UINT_MAX.
Link: https://lkml.kernel.org/r/20210613174022.23044-1-yanfei.xu@windriver.com
Signed-off-by: Yanfei Xu <yanfei.xu@windriver.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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.