From: Lukas Funke <lukas.fu...@weidmueller.com>
This series enables the 'setexpr' command to print "cpu list"-like bitmaps based on the printk format specifier [1]. One use-case is to pass cpu list [2] based kernel parameter like 'isolcpu', 'nohz_full', irq affinity or RCU related CPU parameter to the kernel via a separate firmware variable without exposing the 'bootargs' variable to directly. Example: setexpr isolcpu_bootarg=%32pbl $myCPUisolation && env set bootargs "$isolcpu_bootarg" && bootm [1] https://www.kernel.org/doc/Documentation/printk-formats.txt [2] https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html Lukas Funke (5): sandbox: add generic find_next_zero_bit implementation linux: bitmap.h: add 'for_each_set_bitrange' iteration macro test: cmd: setexptr: Add tests for bitmap string format lib: vsprintf: enable '%*pb[l]' format specifier cmd: printf: forward '%p' format string specifier arch/sandbox/include/asm/bitops.h | 16 ++++++- cmd/printf.c | 29 ++++++++++++ include/linux/bitmap.h | 7 +++ lib/vsprintf.c | 75 +++++++++++++++++++++++++++++++ test/cmd/setexpr.c | 9 ++++ 5 files changed, 134 insertions(+), 2 deletions(-) -- 2.30.2
