diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/hugetlb.c | 2 | ||||
| -rw-r--r-- | mm/maccess.c | 11 | ||||
| -rw-r--r-- | mm/mmap.c | 40 | ||||
| -rw-r--r-- | mm/nommu.c | 42 | ||||
| -rw-r--r-- | mm/percpu.c | 4 | ||||
| -rw-r--r-- | mm/slab.c | 4 | ||||
| -rw-r--r-- | mm/util.c | 44 |
7 files changed, 92 insertions, 55 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 65f38c21820..e91b81b6367 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -402,7 +402,7 @@ static void clear_huge_page(struct page *page, { int i; - if (unlikely(sz > MAX_ORDER_NR_PAGES)) { + if (unlikely(sz/PAGE_SIZE > MAX_ORDER_NR_PAGES)) { clear_gigantic_page(page, addr, sz); return; } diff --git a/mm/maccess.c b/mm/maccess.c index 9073695ff25..4e348dbaecd 100644 --- a/mm/maccess.c +++ b/mm/maccess.c @@ -14,7 +14,11 @@ * Safely read from address @src to the buffer at @dst. If a kernel fault * happens, handle that and return -EFAULT. */ -long probe_kernel_read(void *dst, void *src, size_t size) + +long __weak probe_kernel_read(void *dst, void *src, size_t size) + __attribute__((alias("__probe_kernel_read"))); + +long __probe_kernel_read(void *dst, void *src, size_t size) { long ret; mm_segment_t old_fs = get_fs(); @@ -39,7 +43,10 @@ EXPORT_SYMBOL_GPL(probe_kernel_read); * Safely write to address @dst from the buffer at @src. If a kernel fault * happens, handle that and return -EFAULT. */ -long notrace __weak probe_kernel_write(void *dst, void *src, size_t size) +long __weak probe_kernel_write(void *dst, void *src, size_t size) + __attribute__((alias("__probe_kernel_write"))); + +long __probe_kernel_write(void *dst, void *src, size_t size) { long ret; mm_segment_t old_fs = get_fs(); diff --git a/mm/mmap.c b/mm/mmap.c index d9c77b2dbe9..ee2298936fe 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1043,6 +1043,46 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr, } EXPORT_SYMBOL(do_mmap_pgoff); +SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, + unsigned long, prot, unsigned long, flags, + unsigned long, fd, unsigned long, pgoff) +{ + struct file *file = NULL; + unsigned long retval = -EBADF; + + if (!(flags & MAP_ANONYMOUS)) { + if (unlikely(flags & MAP_HUGETLB)) + return -EINVAL; + file = fget(fd); + if (!file) + goto out; + } else if (flags & MAP_HUGETLB) { + struct user_struct *user = NULL; + /* + * VM_NORESERVE is used because the reservations will be + * taken when vm_ops->mmap() is called + * A dummy user value is used because we are not locking + * memory so no accounting is necessary + */ + len = ALIGN(len, huge_page_size(&default_hstate)); + file = hugetlb_file_setup(HUGETLB_ANON_FILE, len, VM_NORESERVE, + &user, HUGETLB_ANONHUGE_INODE); + if (IS_ERR(file)) + return PTR_ERR(file); + } + + flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); + + down_write(¤t->mm->mmap_sem); + retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); + up_write(¤t->mm->mmap_sem); + + if (file) + fput(file); +out: + return retval; +} + /* * Some shared mappigns will want the pages marked read-only * to track write events. If so, we'll downgrade vm_page_prot diff --git a/mm/nommu.c b/mm/nommu.c index 8687973462b..17773862619 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -432,6 +432,7 @@ SYSCALL_DEFINE1(brk, unsigned long, brk) /* * Ok, looks good - let it rip. */ + flush_icache_range(mm->brk, brk); return mm->brk = brk; } @@ -1353,10 +1354,14 @@ unsigned long do_mmap_pgoff(struct file *file, share: add_vma_to_mm(current->mm, vma); - up_write(&nommu_region_sem); + /* we flush the region from the icache only when the first executable + * mapping of it is made */ + if (vma->vm_flags & VM_EXEC && !region->vm_icache_flushed) { + flush_icache_range(region->vm_start, region->vm_end); + region->vm_icache_flushed = true; + } - if (prot & PROT_EXEC) - flush_icache_range(result, result + len); + up_write(&nommu_region_sem); kleave(" = %lx", result); return result; @@ -1398,6 +1403,31 @@ error_getting_region: } EXPORT_SYMBOL(do_mmap_pgoff); +SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, + unsigned long, prot, unsigned long, flags, + unsigned long, fd, unsigned long, pgoff) +{ + struct file *file = NULL; + unsigned long retval = -EBADF; + + if (!(flags & MAP_ANONYMOUS)) { + file = fget(fd); + if (!file) + goto out; + } + + flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); + + down_write(¤t->mm->mmap_sem); + retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); + up_write(¤t->mm->mmap_sem); + + if (file) + fput(file); +out: + return retval; +} + /* * split a vma into two pieces at address 'addr', a new vma is allocated either * for the first part or the tail. @@ -1891,9 +1921,11 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, in /* only read or write mappings where it is permitted */ if (write && vma->vm_flags & VM_MAYWRITE) - len -= copy_to_user((void *) addr, buf, len); + copy_to_user_page(vma, NULL, addr, + (void *) addr, buf, len); else if (!write && vma->vm_flags & VM_MAYREAD) - len -= copy_from_user(buf, (void *) addr, len); + copy_from_user_page(vma, NULL, addr, + buf, (void *) addr, len); else len = 0; } else { diff --git a/mm/percpu.c b/mm/percpu.c index 442010cc91c..083e7c91e5f 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -1271,7 +1271,7 @@ static void pcpu_reclaim(struct work_struct *work) */ void free_percpu(void *ptr) { - void *addr = __pcpu_ptr_to_addr(ptr); + void *addr; struct pcpu_chunk *chunk; unsigned long flags; int off; @@ -1279,6 +1279,8 @@ void free_percpu(void *ptr) if (!ptr) return; + addr = __pcpu_ptr_to_addr(ptr); + spin_lock_irqsave(&pcpu_lock, flags); chunk = pcpu_chunk_addr_search(addr); diff --git a/mm/slab.c b/mm/slab.c index 7d41f15b48d..7451bdacaf1 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -654,7 +654,7 @@ static void init_node_lock_keys(int q) l3 = s->cs_cachep->nodelists[q]; if (!l3 || OFF_SLAB(s->cs_cachep)) - return; + continue; lockdep_set_class(&l3->list_lock, &on_slab_l3_key); alc = l3->alien; /* @@ -665,7 +665,7 @@ static void init_node_lock_keys(int q) * for alloc_alien_cache, */ if (!alc || (unsigned long)alc == BAD_ALIEN_MAGIC) - return; + continue; for_each_node(r) { if (alc[r]) lockdep_set_class(&alc[r]->lock, diff --git a/mm/util.c b/mm/util.c index b377ce43080..7c35ad95f92 100644 --- a/mm/util.c +++ b/mm/util.c @@ -4,10 +4,6 @@ #include <linux/module.h> #include <linux/err.h> #include <linux/sched.h> -#include <linux/hugetlb.h> -#include <linux/syscalls.h> -#include <linux/mman.h> -#include <linux/file.h> #include <asm/uaccess.h> #define CREATE_TRACE_POINTS @@ -272,46 +268,6 @@ int __attribute__((weak)) get_user_pages_fast(unsigned long start, } EXPORT_SYMBOL_GPL(get_user_pages_fast); -SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, - unsigned long, prot, unsigned long, flags, - unsigned long, fd, unsigned long, pgoff) -{ - struct file * file = NULL; - unsigned long retval = -EBADF; - - if (!(flags & MAP_ANONYMOUS)) { - if (unlikely(flags & MAP_HUGETLB)) - return -EINVAL; - file = fget(fd); - if (!file) - goto out; - } else if (flags & MAP_HUGETLB) { - struct user_struct *user = NULL; - /* - * VM_NORESERVE is used because the reservations will be - * taken when vm_ops->mmap() is called - * A dummy user value is used because we are not locking - * memory so no accounting is necessary - */ - len = ALIGN(len, huge_page_size(&default_hstate)); - file = hugetlb_file_setup(HUGETLB_ANON_FILE, len, VM_NORESERVE, - &user, HUGETLB_ANONHUGE_INODE); - if (IS_ERR(file)) - return PTR_ERR(file); - } - - flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); - - down_write(¤t->mm->mmap_sem); - retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); - up_write(¤t->mm->mmap_sem); - - if (file) - fput(file); -out: - return retval; -} - /* Tracepoints definitions. */ EXPORT_TRACEPOINT_SYMBOL(kmalloc); EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc); |