On Thu, 14 Dec 2023 20:54:47 +0000 Arnd Bergmann <arnd@xxxxxxxxxx> wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
>
> My earlier patch removed __weak function declarations that used to
> be turned into wild branches by the linker, instead causing
> a link failure when the called functions are unavailable:
>
> mips-linux-ld: arch/mips/mm/cache.o: in function `cpu_cache_init':
> cache.c:(.text+0x670): undefined reference to `r3k_cache_init'
>
> The __weak method seems suboptimal, so rather than putting that
> back, make the function calls conditional on the Kconfig symbol
> that controls the compilation.
Cool, thanks.
> Reported-by: kernelci.org bot <bot@xxxxxxxxxxxx>
Please don't forget the Closes: - they're sometimes handy.
> Fixes: 66445677f01e ("mips: move cache declarations into header")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> My broken patch is currently in linux-mm, so the fix should
> be applied on top.
The mm-nonmm-stable branch of mm.git. So I'll queue this separately
and we'll have a minor bisection hole. <git rant elided>
> --- a/arch/mips/mm/cache.c
> +++ b/arch/mips/mm/cache.c
> @@ -205,14 +205,14 @@ static inline void setup_protection_map(void)
>
> void cpu_cache_init(void)
> {
> - if (cpu_has_3k_cache) {
> + if (IS_ENABLED(CONFIG_CPU_R3000) && cpu_has_3k_cache) {
> r3k_cache_init();
> }
> - if (cpu_has_4k_cache) {
> + if (IS_ENABLED(CONFIG_CPU_R4K_CACHE_TLB) && cpu_has_4k_cache) {
> r4k_cache_init();
> }
>
> - if (cpu_has_octeon_cache) {
> + if (IS_ENABLED(CONFIG_CPU_CAVIUM_OCTEON) && cpu_has_octeon_cache) {
> octeon_cache_init();
> }
I just can't help myself.
--- a/arch/mips/mm/cache.c~mips-fix-r3k_cache_init-build-regression-fix
+++ a/arch/mips/mm/cache.c
@@ -205,16 +205,13 @@ static inline void setup_protection_map(
void cpu_cache_init(void)
{
- if (IS_ENABLED(CONFIG_CPU_R3000) && cpu_has_3k_cache) {
+ if (IS_ENABLED(CONFIG_CPU_R3000) && cpu_has_3k_cache)
r3k_cache_init();
- }
- if (IS_ENABLED(CONFIG_CPU_R4K_CACHE_TLB) && cpu_has_4k_cache) {
+ if (IS_ENABLED(CONFIG_CPU_R4K_CACHE_TLB) && cpu_has_4k_cache)
r4k_cache_init();
- }
- if (IS_ENABLED(CONFIG_CPU_CAVIUM_OCTEON) && cpu_has_octeon_cache) {
+ if (IS_ENABLED(CONFIG_CPU_CAVIUM_OCTEON) && cpu_has_octeon_cache)
octeon_cache_init();
- }
setup_protection_map();
}
The rest of the file doesn't do the over-bracing, so there.
