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| author | Nicholas Piggin <npiggin@gmail.com> | 2021-12-02 00:41:50 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-12-09 22:40:24 +1100 |
| commit | debeda017189e40bff23d1c3d2e4567ca8541aed (patch) | |
| tree | f82896f7267656ea2448eb43fbca485a18d2901f /arch/powerpc/mm/mmap.c | |
| parent | af3a0ea41cbf38e967611e262126357d2fd23955 (diff) | |
| download | linux-debeda017189e40bff23d1c3d2e4567ca8541aed.tar.gz linux-debeda017189e40bff23d1c3d2e4567ca8541aed.tar.bz2 linux-debeda017189e40bff23d1c3d2e4567ca8541aed.zip | |
powerpc/64s: Always define arch unmapped area calls
To avoid any functional changes to radix paths when building with hash
MMU support disabled (and CONFIG_PPC_MM_SLICES=n), always define the
arch get_unmapped_area calls on 64s platforms.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211201144153.2456614-16-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/mm/mmap.c')
| -rw-r--r-- | arch/powerpc/mm/mmap.c | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/arch/powerpc/mm/mmap.c b/arch/powerpc/mm/mmap.c index ae683fdc716c..c475cf810aa8 100644 --- a/arch/powerpc/mm/mmap.c +++ b/arch/powerpc/mm/mmap.c @@ -80,6 +80,7 @@ static inline unsigned long mmap_base(unsigned long rnd, return PAGE_ALIGN(DEFAULT_MAP_WINDOW - gap - rnd); } +#ifdef HAVE_ARCH_UNMAPPED_AREA #ifdef CONFIG_PPC_RADIX_MMU /* * Same function as generic code used only for radix, because we don't need to overload @@ -181,11 +182,42 @@ radix__arch_get_unmapped_area_topdown(struct file *filp, */ return radix__arch_get_unmapped_area(filp, addr0, len, pgoff, flags); } +#endif + +unsigned long arch_get_unmapped_area(struct file *filp, + unsigned long addr, + unsigned long len, + unsigned long pgoff, + unsigned long flags) +{ +#ifdef CONFIG_PPC_MM_SLICES + return slice_get_unmapped_area(addr, len, flags, + mm_ctx_user_psize(¤t->mm->context), 0); +#else + BUG(); +#endif +} + +unsigned long arch_get_unmapped_area_topdown(struct file *filp, + const unsigned long addr0, + const unsigned long len, + const unsigned long pgoff, + const unsigned long flags) +{ +#ifdef CONFIG_PPC_MM_SLICES + return slice_get_unmapped_area(addr0, len, flags, + mm_ctx_user_psize(¤t->mm->context), 1); +#else + BUG(); +#endif +} +#endif /* HAVE_ARCH_UNMAPPED_AREA */ static void radix__arch_pick_mmap_layout(struct mm_struct *mm, unsigned long random_factor, struct rlimit *rlim_stack) { +#ifdef CONFIG_PPC_RADIX_MMU if (mmap_is_legacy(rlim_stack)) { mm->mmap_base = TASK_UNMAPPED_BASE; mm->get_unmapped_area = radix__arch_get_unmapped_area; @@ -193,13 +225,9 @@ static void radix__arch_pick_mmap_layout(struct mm_struct *mm, mm->mmap_base = mmap_base(random_factor, rlim_stack); mm->get_unmapped_area = radix__arch_get_unmapped_area_topdown; } -} -#else -/* dummy */ -extern void radix__arch_pick_mmap_layout(struct mm_struct *mm, - unsigned long random_factor, - struct rlimit *rlim_stack); #endif +} + /* * This function, called very early during the creation of a new * process VM image, sets up which VM layout function to use: |