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15ff67bf85
As suggested in review comments: * printk: align numbers using whitespaces instead of tabs; * return error value from init() to avoid calling rmmod if testing again; * use ktime_get instead of get_cycles as some arches don't support it; The output in dmesg (on QEMU arm64): [ 38.823430] Start testing find_bit() with random-filled bitmap [ 38.845358] find_next_bit: 20138448 ns, 163968 iterations [ 38.856217] find_next_zero_bit: 10615328 ns, 163713 iterations [ 38.863564] find_last_bit: 7111888 ns, 163967 iterations [ 40.944796] find_first_bit: 2081007216 ns, 163968 iterations [ 40.944975] [ 40.944975] Start testing find_bit() with sparse bitmap [ 40.945268] find_next_bit: 73216 ns, 656 iterations [ 40.967858] find_next_zero_bit: 22461008 ns, 327025 iterations [ 40.968047] find_last_bit: 62320 ns, 656 iterations [ 40.978060] find_first_bit: 9889360 ns, 656 iterations Link: http://lkml.kernel.org/r/20171124143040.a44jvhmnaiyedg2i@yury-thinkpad Signed-off-by: Yury Norov <ynorov@caviumnetworks.com> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Clement Courbet <courbet@google.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. 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.