At the time of d0484193 (lib/vsprintf.c: expand field_width to 24 bits), there was no compiletime_assert/BUILD_BUG/.... variant that could be used outside function scope. Now we have static_assert(), so move the assertion next to the definition instead of hiding it in some arbitrary function.
Also add the appropriate #include to avoid relying on build_bug.h being pulled in via some arbitrary chain of includes. Signed-off-by: Rasmus Villemoes <li...@rasmusvillemoes.dk> --- v2: added, mostly as an example of use of static_assert(), to check that the compiler actually groks it. lib/vsprintf.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 3add92329bae..30b00de4f321 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -17,6 +17,7 @@ */ #include <stdarg.h> +#include <linux/build_bug.h> #include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/module.h> /* for KSYM_SYMBOL_LEN */ @@ -405,6 +406,8 @@ struct printf_spec { unsigned int base:8; /* number base, 8, 10 or 16 only */ signed int precision:16; /* # of digits/chars */ } __packed; +static_assert(sizeof(struct printf_spec) == 8); + #define FIELD_WIDTH_MAX ((1 << 23) - 1) #define PRECISION_MAX ((1 << 15) - 1) @@ -422,8 +425,6 @@ char *number(char *buf, char *end, unsigned long long num, int field_width = spec.field_width; int precision = spec.precision; - BUILD_BUG_ON(sizeof(struct printf_spec) != 8); - /* locase = 0 or 0x20. ORing digits or letters with 'locase' * produces same digits or (maybe lowercased) letters */ locase = (spec.flags & SMALL); -- 2.20.1