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Message-Id: <8736m5b7gf.fsf@linux.ibm.com>
Date: Fri, 26 Apr 2019 12:04:40 +0530
From: "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>
To: Christophe Leroy <christophe.leroy@....fr>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
Michael Ellerman <mpe@...erman.id.au>
Cc: linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 03/11] powerpc/mm: hand a context_t over to slice_mask_for_size() instead of mm_struct
Christophe Leroy <christophe.leroy@....fr> writes:
> slice_mask_for_size() only uses mm->context, so hand directly a
> pointer to the context. This will help moving the function in
> subarch mmu.h in the next patch by avoiding having to include
> the definition of struct mm_struct
>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@...ux.ibm.com>
> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
> ---
> arch/powerpc/mm/slice.c | 34 +++++++++++++++++-----------------
> 1 file changed, 17 insertions(+), 17 deletions(-)
>
> diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/slice.c
> index 35b278082391..8eb7e8b09c75 100644
> --- a/arch/powerpc/mm/slice.c
> +++ b/arch/powerpc/mm/slice.c
> @@ -151,32 +151,32 @@ static void slice_mask_for_free(struct mm_struct *mm, struct slice_mask *ret,
> }
>
> #ifdef CONFIG_PPC_BOOK3S_64
> -static struct slice_mask *slice_mask_for_size(struct mm_struct *mm, int psize)
> +static struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize)
> {
> #ifdef CONFIG_PPC_64K_PAGES
> if (psize == MMU_PAGE_64K)
> - return mm_ctx_slice_mask_64k(&mm->context);
> + return mm_ctx_slice_mask_64k(&ctx);
> #endif
> if (psize == MMU_PAGE_4K)
> - return mm_ctx_slice_mask_4k(&mm->context);
> + return mm_ctx_slice_mask_4k(&ctx);
> #ifdef CONFIG_HUGETLB_PAGE
> if (psize == MMU_PAGE_16M)
> - return mm_ctx_slice_mask_16m(&mm->context);
> + return mm_ctx_slice_mask_16m(&ctx);
> if (psize == MMU_PAGE_16G)
> - return mm_ctx_slice_mask_16g(&mm->context);
> + return mm_ctx_slice_mask_16g(&ctx);
> #endif
> BUG();
> }
> #elif defined(CONFIG_PPC_8xx)
> -static struct slice_mask *slice_mask_for_size(struct mm_struct *mm, int psize)
> +static struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize)
> {
> if (psize == mmu_virtual_psize)
> - return &mm->context.mask_base_psize;
> + return &ctx->mask_base_psize;
> #ifdef CONFIG_HUGETLB_PAGE
> if (psize == MMU_PAGE_512K)
> - return &mm->context.mask_512k;
> + return &ctx->mask_512k;
> if (psize == MMU_PAGE_8M)
> - return &mm->context.mask_8m;
> + return &ctx->mask_8m;
> #endif
> BUG();
> }
> @@ -246,7 +246,7 @@ static void slice_convert(struct mm_struct *mm,
> slice_dbg("slice_convert(mm=%p, psize=%d)\n", mm, psize);
> slice_print_mask(" mask", mask);
>
> - psize_mask = slice_mask_for_size(mm, psize);
> + psize_mask = slice_mask_for_size(&mm->context, psize);
>
> /* We need to use a spinlock here to protect against
> * concurrent 64k -> 4k demotion ...
> @@ -263,7 +263,7 @@ static void slice_convert(struct mm_struct *mm,
>
> /* Update the slice_mask */
> old_psize = (lpsizes[index] >> (mask_index * 4)) & 0xf;
> - old_mask = slice_mask_for_size(mm, old_psize);
> + old_mask = slice_mask_for_size(&mm->context, old_psize);
> old_mask->low_slices &= ~(1u << i);
> psize_mask->low_slices |= 1u << i;
>
> @@ -282,7 +282,7 @@ static void slice_convert(struct mm_struct *mm,
>
> /* Update the slice_mask */
> old_psize = (hpsizes[index] >> (mask_index * 4)) & 0xf;
> - old_mask = slice_mask_for_size(mm, old_psize);
> + old_mask = slice_mask_for_size(&mm->context, old_psize);
> __clear_bit(i, old_mask->high_slices);
> __set_bit(i, psize_mask->high_slices);
>
> @@ -538,7 +538,7 @@ unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len,
> /* First make up a "good" mask of slices that have the right size
> * already
> */
> - maskp = slice_mask_for_size(mm, psize);
> + maskp = slice_mask_for_size(&mm->context, psize);
>
> /*
> * Here "good" means slices that are already the right page size,
> @@ -565,7 +565,7 @@ unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len,
> * a pointer to good mask for the next code to use.
> */
> if (IS_ENABLED(CONFIG_PPC_64K_PAGES) && psize == MMU_PAGE_64K) {
> - compat_maskp = slice_mask_for_size(mm, MMU_PAGE_4K);
> + compat_maskp = slice_mask_for_size(&mm->context, MMU_PAGE_4K);
> if (fixed)
> slice_or_mask(&good_mask, maskp, compat_maskp);
> else
> @@ -760,7 +760,7 @@ void slice_init_new_context_exec(struct mm_struct *mm)
> /*
> * Slice mask cache starts zeroed, fill the default size cache.
> */
> - mask = slice_mask_for_size(mm, psize);
> + mask = slice_mask_for_size(&mm->context, psize);
> mask->low_slices = ~0UL;
> if (SLICE_NUM_HIGH)
> bitmap_fill(mask->high_slices, SLICE_NUM_HIGH);
> @@ -819,14 +819,14 @@ int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
>
> VM_BUG_ON(radix_enabled());
>
> - maskp = slice_mask_for_size(mm, psize);
> + maskp = slice_mask_for_size(&mm->context, psize);
> #ifdef CONFIG_PPC_64K_PAGES
> /* We need to account for 4k slices too */
> if (psize == MMU_PAGE_64K) {
> const struct slice_mask *compat_maskp;
> struct slice_mask available;
>
> - compat_maskp = slice_mask_for_size(mm, MMU_PAGE_4K);
> + compat_maskp = slice_mask_for_size(&mm->context, MMU_PAGE_4K);
> slice_or_mask(&available, maskp, compat_maskp);
> return !slice_check_range_fits(mm, &available, addr, len);
> }
> --
> 2.13.3
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