diff options
Diffstat (limited to 'arch/arm64')
-rw-r--r-- | arch/arm64/Kconfig | 2 | ||||
-rw-r--r-- | arch/arm64/include/asm/pgalloc.h | 2 | ||||
-rw-r--r-- | arch/arm64/include/asm/pgtable.h | 2 | ||||
-rw-r--r-- | arch/arm64/include/asm/processor.h | 2 | ||||
-rw-r--r-- | arch/arm64/kernel/process.c | 8 | ||||
-rw-r--r-- | arch/arm64/mm/flush.c | 3 | ||||
-rw-r--r-- | arch/arm64/mm/mmap.c | 72 | ||||
-rw-r--r-- | arch/arm64/mm/pgd.c | 2 |
8 files changed, 3 insertions, 90 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 37c610963eee..866e05882799 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -15,7 +15,6 @@ config ARM64 select ARCH_HAS_DMA_COHERENT_TO_PFN select ARCH_HAS_DMA_PREP_COHERENT select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI - select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_FAST_MULTIPLIER select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_GCOV_PROFILE_ALL @@ -71,6 +70,7 @@ config ARM64 select ARCH_SUPPORTS_INT128 if GCC_VERSION >= 50000 || CC_IS_CLANG select ARCH_SUPPORTS_NUMA_BALANCING select ARCH_WANT_COMPAT_IPC_PARSE_VERSION if COMPAT + select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT select ARCH_WANT_FRAME_POINTERS select ARCH_WANT_HUGE_PMD_SHARE if ARM64_4K_PAGES || (ARM64_16K_PAGES && !ARM64_VA_BITS_36) select ARCH_HAS_UBSAN_SANITIZE_ALL diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h index 14d0bc44d451..172d76fa0245 100644 --- a/arch/arm64/include/asm/pgalloc.h +++ b/arch/arm64/include/asm/pgalloc.h @@ -15,8 +15,6 @@ #include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ -#define check_pgt_cache() do { } while (0) - #define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t)) #if CONFIG_PGTABLE_LEVELS > 2 diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 57427d17580e..7576df00eb50 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -861,8 +861,6 @@ extern int kern_addr_valid(unsigned long addr); #include <asm-generic/pgtable.h> -static inline void pgtable_cache_init(void) { } - /* * On AArch64, the cache coherency is handled via the set_pte_at() function. */ diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index c67848c55009..5623685c7d13 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -280,8 +280,6 @@ static inline void spin_lock_prefetch(const void *ptr) "nop") : : "p" (ptr)); } -#define HAVE_ARCH_PICK_MMAP_LAYOUT - extern unsigned long __ro_after_init signal_minsigstksz; /* sigframe size */ extern void __init minsigstksz_setup(void); diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 03689c0beb34..a47462def04b 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -557,14 +557,6 @@ unsigned long arch_align_stack(unsigned long sp) return sp & ~0xf; } -unsigned long arch_randomize_brk(struct mm_struct *mm) -{ - if (is_compat_task()) - return randomize_page(mm->brk, SZ_32M); - else - return randomize_page(mm->brk, SZ_1G); -} - /* * Called from setup_new_exec() after (COMPAT_)SET_PERSONALITY. */ diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c index dc19300309d2..ac485163a4a7 100644 --- a/arch/arm64/mm/flush.c +++ b/arch/arm64/mm/flush.c @@ -56,8 +56,7 @@ void __sync_icache_dcache(pte_t pte) struct page *page = pte_page(pte); if (!test_and_set_bit(PG_dcache_clean, &page->flags)) - sync_icache_aliases(page_address(page), - PAGE_SIZE << compound_order(page)); + sync_icache_aliases(page_address(page), page_size(page)); } EXPORT_SYMBOL_GPL(__sync_icache_dcache); diff --git a/arch/arm64/mm/mmap.c b/arch/arm64/mm/mmap.c index b050641b5139..3028bacbc4e9 100644 --- a/arch/arm64/mm/mmap.c +++ b/arch/arm64/mm/mmap.c @@ -21,78 +21,6 @@ #include <asm/cputype.h> /* - * Leave enough space between the mmap area and the stack to honour ulimit in - * the face of randomisation. - */ -#define MIN_GAP (SZ_128M) -#define MAX_GAP (STACK_TOP/6*5) - -static int mmap_is_legacy(struct rlimit *rlim_stack) -{ - if (current->personality & ADDR_COMPAT_LAYOUT) - return 1; - - if (rlim_stack->rlim_cur == RLIM_INFINITY) - return 1; - - return sysctl_legacy_va_layout; -} - -unsigned long arch_mmap_rnd(void) -{ - unsigned long rnd; - -#ifdef CONFIG_COMPAT - if (test_thread_flag(TIF_32BIT)) - rnd = get_random_long() & ((1UL << mmap_rnd_compat_bits) - 1); - else -#endif - rnd = get_random_long() & ((1UL << mmap_rnd_bits) - 1); - return rnd << PAGE_SHIFT; -} - -static unsigned long mmap_base(unsigned long rnd, struct rlimit *rlim_stack) -{ - unsigned long gap = rlim_stack->rlim_cur; - unsigned long pad = (STACK_RND_MASK << PAGE_SHIFT) + stack_guard_gap; - - /* Values close to RLIM_INFINITY can overflow. */ - if (gap + pad > gap) - gap += pad; - - if (gap < MIN_GAP) - gap = MIN_GAP; - else if (gap > MAX_GAP) - gap = MAX_GAP; - - return PAGE_ALIGN(STACK_TOP - gap - rnd); -} - -/* - * This function, called very early during the creation of a new process VM - * image, sets up which VM layout function to use: - */ -void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack) -{ - unsigned long random_factor = 0UL; - - if (current->flags & PF_RANDOMIZE) - random_factor = arch_mmap_rnd(); - - /* - * Fall back to the standard layout if the personality bit is set, or - * if the expected stack growth is unlimited: - */ - if (mmap_is_legacy(rlim_stack)) { - mm->mmap_base = TASK_UNMAPPED_BASE + random_factor; - mm->get_unmapped_area = arch_get_unmapped_area; - } else { - mm->mmap_base = mmap_base(random_factor, rlim_stack); - mm->get_unmapped_area = arch_get_unmapped_area_topdown; - } -} - -/* * You really shouldn't be using read() or write() on /dev/mem. This might go * away in the future. */ diff --git a/arch/arm64/mm/pgd.c b/arch/arm64/mm/pgd.c index 7548f9ca1f11..4a64089e5771 100644 --- a/arch/arm64/mm/pgd.c +++ b/arch/arm64/mm/pgd.c @@ -35,7 +35,7 @@ void pgd_free(struct mm_struct *mm, pgd_t *pgd) kmem_cache_free(pgd_cache, pgd); } -void __init pgd_cache_init(void) +void __init pgtable_cache_init(void) { if (PGD_SIZE == PAGE_SIZE) return; |