Christophe Leroy <christophe.le...@csgroup.eu> writes:
> Rewrite __real_pte() and __rpte_to_hidx() as static inline in order to
> avoid following warnings/errors when building with 4k page size:
>
> CC arch/powerpc/mm/book3s64/hash_tlb.o
> arch/powerpc/mm/book3s64/hash_tlb.c: In function 'hpte_need_flush':
> arch/powerpc/mm/book3s64/hash_tlb.c:49:16: error: variable 'offset' set
> but not used [-Werror=unused-but-set-variable]
> 49 | int i, offset;
> | ^~~~~~
>
> CC arch/powerpc/mm/book3s64/hash_native.o
> arch/powerpc/mm/book3s64/hash_native.c: In function
> 'native_flush_hash_range':
> arch/powerpc/mm/book3s64/hash_native.c:782:29: error: variable 'index'
> set but not used [-Werror=unused-but-set-variable]
> 782 | unsigned long hash, index, hidx, shift, slot;
> | ^~~~~
>
> Reported-by: kernel test robot <l...@intel.com>
> Closes:
> https://lore.kernel.org/oe-kbuild-all/202501081741.ayfwybsq-...@intel.com/
> Fixes: ff31e105464d ("powerpc/mm/hash64: Store the slot information at the
> right offset for hugetlb")
> Signed-off-by: Christophe Leroy <christophe.le...@csgroup.eu>
> ---
> v2: Also inline __rpte_to_hidx() for the same reason
Thanks for addressing the other warning too in v2. I also tested the
changes on my system and this fixes both the reported warnings.
The changes looks good to me. Please feel free to add -
Reviewed-by: Ritesh Harjani (IBM) <ritesh.l...@gmail.com>
> ---
> arch/powerpc/include/asm/book3s/64/hash-4k.h | 12 ++++++++++--
> 1 file changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/book3s/64/hash-4k.h
> b/arch/powerpc/include/asm/book3s/64/hash-4k.h
> index c3efacab4b94..aa90a048f319 100644
> --- a/arch/powerpc/include/asm/book3s/64/hash-4k.h
> +++ b/arch/powerpc/include/asm/book3s/64/hash-4k.h
> @@ -77,9 +77,17 @@
> /*
> * With 4K page size the real_pte machinery is all nops.
> */
> -#define __real_pte(e, p, o) ((real_pte_t){(e)})
> +static inline real_pte_t __real_pte(pte_t pte, pte_t *ptep, int offset)
> +{
> + return (real_pte_t){pte};
> +}
> +
> #define __rpte_to_pte(r) ((r).pte)
> -#define __rpte_to_hidx(r,index) (pte_val(__rpte_to_pte(r)) >>
> H_PAGE_F_GIX_SHIFT)
> +
> +static inline unsigned long __rpte_to_hidx(real_pte_t rpte, unsigned long
> index)
> +{
> + return pte_val(__rpte_to_pte(rpte)) >> H_PAGE_F_GIX_SHIFT;
> +}
>
> #define pte_iterate_hashed_subpages(rpte, psize, va, index, shift) \
> do { \
> --
> 2.47.0
