[PATCH 0/4] log2: make is_power_of_2() more generic

[Jani Nikula]

is_power_of_2() only works for types <= sizeof(unsigned long) and it's
also not a constant expression. There are a number of places in kernel
where is_power_of_2() is called on u64, which fails on 32-bit
builds. Try to remedy that. While at it, make it a constant expression
when possible.

I admit I've only lightly tested this, and I haven't tried it with
allmodconfig.


Jani Nikula (4):
  log2: add helper __IS_POWER_OF_2()
  log2: have is_power_of_2() support bigger types than unsigned long
  log2: allow use of is_power_of_2() in constant expressions
  drm/i915/reg: use is_power_of_2() from log2.h

 drivers/gpu/drm/i915/i915_reg_defs.h |  7 +------
 include/linux/log2.h                 | 25 ++++++++++++++++++++-----
 2 files changed, 21 insertions(+), 11 deletions(-)

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2.39.2