[PATCH 0/4] lib/vsprintf: Remove atomic-unsafe support for printk format %pCr

[geert+renesas@glider.be (Geert Uytterhoeven)]

	Hi all,

"%pCr" formats the current rate of a clock, and calls clk_get_rate().
The latter obtains a mutex, hence it must not be called from atomic
context.  As vsprintf() (and e.g. printk()) must be callable from any
context, it's better to remove support for this (rarely-used) format.

This patch series:
  - Changes all existing users of "%pCr" to print the result of
    clk_get_rate() directly, which is safe as they all do this in task
    context only,
  - Removes support for the "%pCr" printk format.

Note that any remaining out-of-tree users will start seeing the clock's
name printed instead of its rate.

Thanks for your comments!

Geert Uytterhoeven (4):
  clk: renesas: cpg-mssr: Stop using printk format %pCr
  thermal: bcm2835: Stop using printk format %pCr
  serial: sh-sci: Stop using printk format %pCr
  lib/vsprintf: Remove atomic-unsafe support for %pCr

 Documentation/core-api/printk-formats.rst  | 3 +--
 drivers/clk/renesas/renesas-cpg-mssr.c     | 9 +++++----
 drivers/thermal/broadcom/bcm2835_thermal.c | 4 ++--
 drivers/tty/serial/sh-sci.c                | 4 ++--
 lib/vsprintf.c                             | 3 ---
 5 files changed, 10 insertions(+), 13 deletions(-)

-- 
2.7.4

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds