diff --git a/arch/um/include/asm/mmu_context.h b/arch/um/include/asm/mmu_context.h index 68e2eb9cfb47..23dcc914d44e 100644 --- a/arch/um/include/asm/mmu_context.h +++ b/arch/um/include/asm/mmu_context.h @@ -13,8 +13,6 @@ #include #include -extern void force_flush_all(void); - #define activate_mm activate_mm static inline void activate_mm(struct mm_struct *old, struct mm_struct *new) { diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index 79f41f06a98f..f36b63f53bab 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -122,8 +122,6 @@ void new_thread_handler(void) /* Called magically, see new_thread_handler above */ static void fork_handler(void) { - force_flush_all(); - schedule_tail(current->thread.prev_sched); /* diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c index 1eee7134cba8..4f482b881adc 100644 --- a/arch/um/kernel/tlb.c +++ b/arch/um/kernel/tlb.c @@ -41,17 +41,15 @@ struct host_vm_change { int index; struct mm_struct *mm; void *data; - int force; }; -#define INIT_HVC(mm, force, userspace) \ +#define INIT_HVC(mm, userspace) \ ((struct host_vm_change) \ { .ops = { { .type = NONE } }, \ .mm = mm, \ .data = NULL, \ .userspace = userspace, \ - .index = 0, \ - .force = force }) + .index = 0 }) void report_enomem(void) { @@ -235,7 +233,7 @@ static inline int update_pte_range(pmd_t *pmd, unsigned long addr, prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) | (x ? UM_PROT_EXEC : 0)); - if (hvc->force || pte_newpage(*pte)) { + if (pte_newpage(*pte)) { if (pte_present(*pte)) { if (pte_newpage(*pte)) ret = add_mmap(addr, pte_val(*pte) & PAGE_MASK, @@ -261,7 +259,7 @@ static inline int update_pmd_range(pud_t *pud, unsigned long addr, do { next = pmd_addr_end(addr, end); if (!pmd_present(*pmd)) { - if (hvc->force || pmd_newpage(*pmd)) { + if (pmd_newpage(*pmd)) { ret = add_munmap(addr, next - addr, hvc); pmd_mkuptodate(*pmd); } @@ -283,7 +281,7 @@ static inline int update_pud_range(p4d_t *p4d, unsigned long addr, do { next = pud_addr_end(addr, end); if (!pud_present(*pud)) { - if (hvc->force || pud_newpage(*pud)) { + if (pud_newpage(*pud)) { ret = add_munmap(addr, next - addr, hvc); pud_mkuptodate(*pud); } @@ -305,7 +303,7 @@ static inline int update_p4d_range(pgd_t *pgd, unsigned long addr, do { next = p4d_addr_end(addr, end); if (!p4d_present(*p4d)) { - if (hvc->force || p4d_newpage(*p4d)) { + if (p4d_newpage(*p4d)) { ret = add_munmap(addr, next - addr, hvc); p4d_mkuptodate(*p4d); } @@ -316,19 +314,19 @@ static inline int update_p4d_range(pgd_t *pgd, unsigned long addr, } static void fix_range_common(struct mm_struct *mm, unsigned long start_addr, - unsigned long end_addr, int force) + unsigned long end_addr) { pgd_t *pgd; struct host_vm_change hvc; unsigned long addr = start_addr, next; int ret = 0, userspace = 1; - hvc = INIT_HVC(mm, force, userspace); + hvc = INIT_HVC(mm, userspace); pgd = pgd_offset(mm, addr); do { next = pgd_addr_end(addr, end_addr); if (!pgd_present(*pgd)) { - if (force || pgd_newpage(*pgd)) { + if (pgd_newpage(*pgd)) { ret = add_munmap(addr, next - addr, &hvc); pgd_mkuptodate(*pgd); } @@ -349,11 +347,11 @@ static int flush_tlb_kernel_range_common(unsigned long start, unsigned long end) pmd_t *pmd; pte_t *pte; unsigned long addr, last; - int updated = 0, err = 0, force = 0, userspace = 0; + int updated = 0, err = 0, userspace = 0; struct host_vm_change hvc; mm = &init_mm; - hvc = INIT_HVC(mm, force, userspace); + hvc = INIT_HVC(mm, userspace); for (addr = start; addr < end;) { pgd = pgd_offset(mm, addr); if (!pgd_present(*pgd)) { @@ -537,7 +535,7 @@ void __flush_tlb_one(unsigned long addr) } static void fix_range(struct mm_struct *mm, unsigned long start_addr, - unsigned long end_addr, int force) + unsigned long end_addr) { /* * Don't bother flushing if this address space is about to be @@ -546,7 +544,7 @@ static void fix_range(struct mm_struct *mm, unsigned long start_addr, if (atomic_read(&mm->mm_users) == 0) return; - fix_range_common(mm, start_addr, end_addr, force); + fix_range_common(mm, start_addr, end_addr); } void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, @@ -554,7 +552,7 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, { if (vma->vm_mm == NULL) flush_tlb_kernel_range_common(start, end); - else fix_range(vma->vm_mm, start, end, 0); + else fix_range(vma->vm_mm, start, end); } EXPORT_SYMBOL(flush_tlb_range); @@ -564,17 +562,5 @@ void flush_tlb_mm(struct mm_struct *mm) VMA_ITERATOR(vmi, mm, 0); for_each_vma(vmi, vma) - fix_range(mm, vma->vm_start, vma->vm_end, 0); -} - -void force_flush_all(void) -{ - struct mm_struct *mm = current->mm; - struct vm_area_struct *vma; - VMA_ITERATOR(vmi, mm, 0); - - mmap_read_lock(mm); - for_each_vma(vmi, vma) - fix_range(mm, vma->vm_start, vma->vm_end, 1); - mmap_read_unlock(mm); + fix_range(mm, vma->vm_start, vma->vm_end); }