[PATCH v3 1/5] kernel: Add helper macros for loop unrolling

[Song Liu]

On Mon, Sep 18, 2023 at 2:25 PM KP Singh <kpsingh at kernel.org> wrote:
>
> This helps in easily initializing blocks of code (e.g. static calls and
> keys).
>
> UNROLL(N, MACRO, __VA_ARGS__) calls MACRO N times with the first
> argument as the index of the iteration. This allows string pasting to
> create unique tokens for variable names, function calls etc.
>
> As an example:
>
>         #include <linux/unroll.h>
>
>         #define MACRO(N, a, b)            \
>                 int add_##N(int a, int b) \
>                 {                         \
>                         return a + b + N; \
>                 }
>
>         UNROLL(2, MACRO, x, y)
>
> expands to:
>
>         int add_0(int x, int y)
>         {
>                 return x + y + 0;
>         }
>
>         int add_1(int x, int y)
>         {
>                 return x + y + 1;
>         }
>
> Signed-off-by: KP Singh <kpsingh at kernel.org>

Acked-by: Song Liu <song at kernel.org>