diff options
Diffstat (limited to 'arch/avr32/mm')
| -rw-r--r-- | arch/avr32/mm/cache.c | 3 | ||||
| -rw-r--r-- | arch/avr32/mm/dma-coherent.c | 1 | ||||
| -rw-r--r-- | arch/avr32/mm/fault.c | 38 | ||||
| -rw-r--r-- | arch/avr32/mm/init.c | 74 |
4 files changed, 41 insertions, 75 deletions
diff --git a/arch/avr32/mm/cache.c b/arch/avr32/mm/cache.c index 24a74d1ca7d..85d635cd7b2 100644 --- a/arch/avr32/mm/cache.c +++ b/arch/avr32/mm/cache.c @@ -111,9 +111,10 @@ void flush_icache_range(unsigned long start, unsigned long end) __flush_icache_range(start & ~(linesz - 1), (end + linesz - 1) & ~(linesz - 1)); } +EXPORT_SYMBOL(flush_icache_range); /* - * This one is called from do_no_page(), do_swap_page() and install_page(). + * This one is called from __do_fault() and do_swap_page(). */ void flush_icache_page(struct vm_area_struct *vma, struct page *page) { diff --git a/arch/avr32/mm/dma-coherent.c b/arch/avr32/mm/dma-coherent.c index 3c0042247ea..50cdb5b10f0 100644 --- a/arch/avr32/mm/dma-coherent.c +++ b/arch/avr32/mm/dma-coherent.c @@ -8,6 +8,7 @@ #include <linux/dma-mapping.h> #include <linux/gfp.h> +#include <linux/export.h> #include <asm/addrspace.h> #include <asm/cacheflush.h> diff --git a/arch/avr32/mm/fault.c b/arch/avr32/mm/fault.c index f7040a1e399..0eca9332719 100644 --- a/arch/avr32/mm/fault.c +++ b/arch/avr32/mm/fault.c @@ -61,10 +61,10 @@ asmlinkage void do_page_fault(unsigned long ecr, struct pt_regs *regs) const struct exception_table_entry *fixup; unsigned long address; unsigned long page; - int writeaccess; long signr; int code; int fault; + unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE; if (notify_page_fault(regs, ecr)) return; @@ -86,6 +86,9 @@ asmlinkage void do_page_fault(unsigned long ecr, struct pt_regs *regs) local_irq_enable(); + if (user_mode(regs)) + flags |= FAULT_FLAG_USER; +retry: down_read(&mm->mmap_sem); vma = find_vma(mm, address); @@ -104,7 +107,6 @@ asmlinkage void do_page_fault(unsigned long ecr, struct pt_regs *regs) */ good_area: code = SEGV_ACCERR; - writeaccess = 0; switch (ecr) { case ECR_PROTECTION_X: @@ -121,7 +123,7 @@ good_area: case ECR_TLB_MISS_W: if (!(vma->vm_flags & VM_WRITE)) goto bad_area; - writeaccess = 1; + flags |= FAULT_FLAG_WRITE; break; default: panic("Unhandled case %lu in do_page_fault!", ecr); @@ -132,7 +134,11 @@ good_area: * sure we exit gracefully rather than endlessly redo the * fault. */ - fault = handle_mm_fault(mm, vma, address, writeaccess ? FAULT_FLAG_WRITE : 0); + fault = handle_mm_fault(mm, vma, address, flags); + + if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current)) + return; + if (unlikely(fault & VM_FAULT_ERROR)) { if (fault & VM_FAULT_OOM) goto out_of_memory; @@ -140,10 +146,24 @@ good_area: goto do_sigbus; BUG(); } - if (fault & VM_FAULT_MAJOR) - tsk->maj_flt++; - else - tsk->min_flt++; + + if (flags & FAULT_FLAG_ALLOW_RETRY) { + if (fault & VM_FAULT_MAJOR) + tsk->maj_flt++; + else + tsk->min_flt++; + if (fault & VM_FAULT_RETRY) { + flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; + + /* + * No need to up_read(&mm->mmap_sem) as we would have + * already released it in __lock_page_or_retry() in + * mm/filemap.c. + */ + goto retry; + } + } up_read(&mm->mmap_sem); return; @@ -210,9 +230,9 @@ no_context: */ out_of_memory: up_read(&mm->mmap_sem); - pagefault_out_of_memory(); if (!user_mode(regs)) goto no_context; + pagefault_out_of_memory(); return; do_sigbus: diff --git a/arch/avr32/mm/init.c b/arch/avr32/mm/init.c index a7314d44b17..def5391d927 100644 --- a/arch/avr32/mm/init.c +++ b/arch/avr32/mm/init.c @@ -25,8 +25,6 @@ #include <asm/setup.h> #include <asm/sections.h> -DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); - pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned_data; struct page *empty_zero_page; @@ -102,80 +100,26 @@ void __init paging_init(void) void __init mem_init(void) { - int codesize, reservedpages, datasize, initsize; - int nid, i; + pg_data_t *pgdat; - reservedpages = 0; high_memory = NULL; + for_each_online_pgdat(pgdat) + high_memory = max_t(void *, high_memory, + __va(pgdat_end_pfn(pgdat) << PAGE_SHIFT)); - /* this will put all low memory onto the freelists */ - for_each_online_node(nid) { - pg_data_t *pgdat = NODE_DATA(nid); - unsigned long node_pages = 0; - void *node_high_memory; - - num_physpages += pgdat->node_present_pages; - - if (pgdat->node_spanned_pages != 0) - node_pages = free_all_bootmem_node(pgdat); - - totalram_pages += node_pages; - - for (i = 0; i < node_pages; i++) - if (PageReserved(pgdat->node_mem_map + i)) - reservedpages++; - - node_high_memory = (void *)((pgdat->node_start_pfn - + pgdat->node_spanned_pages) - << PAGE_SHIFT); - if (node_high_memory > high_memory) - high_memory = node_high_memory; - } - - max_mapnr = MAP_NR(high_memory); - - codesize = (unsigned long)_etext - (unsigned long)_text; - datasize = (unsigned long)_edata - (unsigned long)_data; - initsize = (unsigned long)__init_end - (unsigned long)__init_begin; - - printk ("Memory: %luk/%luk available (%dk kernel code, " - "%dk reserved, %dk data, %dk init)\n", - nr_free_pages() << (PAGE_SHIFT - 10), - totalram_pages << (PAGE_SHIFT - 10), - codesize >> 10, - reservedpages << (PAGE_SHIFT - 10), - datasize >> 10, - initsize >> 10); -} - -static inline void free_area(unsigned long addr, unsigned long end, char *s) -{ - unsigned int size = (end - addr) >> 10; - - for (; addr < end; addr += PAGE_SIZE) { - struct page *page = virt_to_page(addr); - ClearPageReserved(page); - init_page_count(page); - free_page(addr); - totalram_pages++; - } - - if (size && s) - printk(KERN_INFO "Freeing %s memory: %dK (%lx - %lx)\n", - s, size, end - (size << 10), end); + set_max_mapnr(MAP_NR(high_memory)); + free_all_bootmem(); + mem_init_print_info(NULL); } void free_initmem(void) { - free_area((unsigned long)__init_begin, (unsigned long)__init_end, - "init"); + free_initmem_default(-1); } #ifdef CONFIG_BLK_DEV_INITRD - void free_initrd_mem(unsigned long start, unsigned long end) { - free_area(start, end, "initrd"); + free_reserved_area((void *)start, (void *)end, -1, "initrd"); } - #endif |