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From: Patchwork <patchwork@emeril.freedesktop.org>
To: "Jani Nikula" <jani.nikula@intel.com>
Date: Thu, 30 Mar 2023 11:10:03 -0000
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Subject: [Intel-gfx] =?utf-8?b?4pyXIEZpLkNJLkNIRUNLUEFUQ0g6IHdhcm5pbmcg?=
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== Series Details ==

Series: log2: make is_power_of_2() more generic
URL   : https://patchwork.freedesktop.org/series/115863/
State : warning

== Summary ==

Error: dim checkpatch failed
5c5c2de058cb log2: add helper __IS_POWER_OF_2()
-:24: CHECK:MACRO_ARG_REUSE: Macro argument reuse 'n' - possible side-effects?
#24: FILE: include/linux/log2.h:36:
+#define __IS_POWER_OF_2(n) ((n) != 0 && (((n) & ((n) - 1)) == 0))

total: 0 errors, 0 warnings, 1 checks, 16 lines checked
66a1c1b93361 log2: have is_power_of_2() support bigger types than unsigned long
-:28: WARNING:PREFER_DEFINED_ATTRIBUTE_MACRO: Prefer __attribute_const__ over __attribute__((const))
#28: FILE: include/linux/log2.h:38:
+static inline __attribute__((const))

-:34: WARNING:PREFER_DEFINED_ATTRIBUTE_MACRO: Prefer __attribute_const__ over __attribute__((const))
#34: FILE: include/linux/log2.h:44:
+static inline __attribute__((const))

-:52: CHECK:MACRO_ARG_REUSE: Macro argument reuse 'n' - possible side-effects?
#52: FILE: include/linux/log2.h:58:
+#define is_power_of_2(n)						\
+	__builtin_choose_expr(sizeof(n) > sizeof(unsigned long),	\
+			      __is_power_of_2_ull(n),			\
+			      __is_power_of_2(n))

total: 0 errors, 2 warnings, 1 checks, 33 lines checked
1d19fef56ddc log2: allow use of is_power_of_2() in constant expressions
385585e52a78 drm/i915/reg: use is_power_of_2() from log2.h