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Andrew, can we get these patches in to -mm?
This adds i_seqcnt to inode structure and then uses i_size_read() and
i_size_write() to provide atomic access to i_size. This is port
of Andrea Arcangeli i_size atomic access patch from 2.4. This only
uses the generic reader/writer consistent mechanism.
re-diff against 2.5.68.
This patch is available for download from OSDL's patch lifecycle
manager (PLM):
http://www.osdl.org/cgi-bin/plm?module=patch_info&patch_id=1802
This has been tested on a 2-proc system and several other
systems using OSDL's STP (http://www.osdl.org/stp/).
Thanks,
-- Daniel McNeil <daniel@osdl.org>--=_courier-22714-1051230972-0001-2 Content-Type: text/x-patch; name="patch-2.5.68-isize.2"; charset=iso-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=patch-2.5.68-isize.2
diff -rupN -X /home/daniel/dontdiff linux-2.5.68/drivers/block/loop.c linux-2.5.68-isize/drivers/block/loop.c --- linux-2.5.68/drivers/block/loop.c Sat Apr 19 19:49:57 2003 +++ linux-2.5.68-isize/drivers/block/loop.c Thu Apr 24 14:32:28 2003 @@ -153,7 +153,7 @@ struct loop_func_table *xfer_funcs[MAX_L static int figure_loop_size(struct loop_device *lo) { - loff_t size = lo->lo_backing_file->f_dentry->d_inode->i_mapping->host->i_size; + loff_t size = i_size_read(lo->lo_backing_file->f_dentry->d_inode->i_mapping->host); sector_t x; /* * Unfortunately, if we want to do I/O on the device, diff -rupN -X /home/daniel/dontdiff linux-2.5.68/fs/attr.c linux-2.5.68-isize/fs/attr.c --- linux-2.5.68/fs/attr.c Sat Apr 19 19:48:51 2003 +++ linux-2.5.68-isize/fs/attr.c Thu Apr 24 14:32:28 2003 @@ -68,7 +68,7 @@ int inode_setattr(struct inode * inode, int error = 0; if (ia_valid & ATTR_SIZE) { - if (attr->ia_size != inode->i_size) + if (attr->ia_size != i_size_read(inode)) error = vmtruncate(inode, attr->ia_size); if (error || (ia_valid == ATTR_SIZE)) goto out; diff -rupN -X /home/daniel/dontdiff linux-2.5.68/fs/binfmt_aout.c linux-2.5.68-isize/fs/binfmt_aout.c --- linux-2.5.68/fs/binfmt_aout.c Sat Apr 19 19:48:54 2003 +++ linux-2.5.68-isize/fs/binfmt_aout.c Thu Apr 24 14:32:28 2003 @@ -269,7 +269,7 @@ static int load_aout_binary(struct linux if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != OMAGIC && N_MAGIC(ex) != QMAGIC && N_MAGIC(ex) != NMAGIC) || N_TRSIZE(ex) || N_DRSIZE(ex) || - bprm->file->f_dentry->d_inode->i_size < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { + i_size_read(bprm->file->f_dentry->d_inode) < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { return -ENOEXEC; } @@ -454,7 +454,7 @@ static int load_aout_library(struct file /* We come in here for the regular a.out style of shared libraries */ if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC) || N_TRSIZE(ex) || N_DRSIZE(ex) || ((ex.a_entry & 0xfff) && N_MAGIC(ex) == ZMAGIC) || - inode->i_size < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { + i_size_read(inode) < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { goto out; } diff -rupN -X /home/daniel/dontdiff linux-2.5.68/fs/block_dev.c linux-2.5.68-isize/fs/block_dev.c --- linux-2.5.68/fs/block_dev.c Sat Apr 19 19:51:22 2003 +++ linux-2.5.68-isize/fs/block_dev.c Thu Apr 24 14:32:28 2003 @@ -29,7 +29,7 @@ static sector_t max_block(struct block_device *bdev) { sector_t retval = ~((sector_t)0); - loff_t sz = bdev->bd_inode->i_size; + loff_t sz = i_size_read(bdev->bd_inode); if (sz) { unsigned int size = block_size(bdev); @@ -156,7 +156,7 @@ static int blkdev_commit_write(struct fi static loff_t block_llseek(struct file *file, loff_t offset, int origin) { /* ewww */ - loff_t size = file->f_dentry->d_inode->i_bdev->bd_inode->i_size; + loff_t size = i_size_read(file->f_dentry->d_inode->i_bdev->bd_inode); loff_t retval; lock_kernel(); @@ -499,7 +499,7 @@ int __check_disk_change(dev_t dev) static void bd_set_size(struct block_device *bdev, loff_t size) { unsigned bsize = bdev_hardsect_size(bdev); - bdev->bd_inode->i_size = size; + i_size_write(bdev->bd_inode, size); while (bsize < PAGE_CACHE_SIZE) { if (size & bsize) break; diff -rupN -X /home/daniel/dontdiff linux-2.5.68/fs/buffer.c linux-2.5.68-isize/fs/buffer.c --- linux-2.5.68/fs/buffer.c Sat Apr 19 19:49:57 2003 +++ linux-2.5.68-isize/fs/buffer.c Thu Apr 24 14:32:28 2003 @@ -1627,7 +1627,7 @@ static int __block_write_full_page(struc BUG_ON(!PageLocked(page)); - last_block = (inode->i_size - 1) >> inode->i_blkbits; + last_block = (i_size_read(inode) - 1) >> inode->i_blkbits; if (!page_has_buffers(page)) { if (!PageUptodate(page)) @@ -1964,7 +1964,7 @@ int block_read_full_page(struct page *pa blocks = PAGE_CACHE_SIZE >> inode->i_blkbits; iblock = (sector_t)page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits); - lblock = (inode->i_size+blocksize-1) >> inode->i_blkbits; + lblock = (i_size_read(inode)+blocksize-1) >> inode->i_blkbits; bh = head; nr = 0; i = 0; @@ -2189,8 +2189,12 @@ int generic_commit_write(struct file *fi struct inode *inode = page->mapping->host; loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to; __block_commit_write(inode,page,from,to); + /* + * No need to use i_size_read() here, the i_size + * cannot change under us because we hold i_sem. + */ if (pos > inode->i_size) { - inode->i_size = pos; + i_size_write(inode, pos); mark_inode_dirty(inode); } return 0; @@ -2342,7 +2346,7 @@ int nobh_commit_write(struct file *file, set_page_dirty(page); if (pos > inode->i_size) { - inode->i_size = pos; + i_size_write(inode, pos); mark_inode_dirty(inode); } return 0; @@ -2472,7 +2476,8 @@ int block_write_full_page(struct page *p struct writeback_control *wbc) { struct inode * const inode = page->mapping->host; - const unsigned long end_index = inode->i_size >> PAGE_CACHE_SHIFT; + loff_t i_size = i_size_read(inode); + const unsigned long end_index = i_size >> PAGE_CACHE_SHIFT; unsigned offset; void *kaddr; @@ -2481,7 +2486,7 @@ int block_write_full_page(struct page *p return __block_write_full_page(inode, page, get_block, wbc); /* Is the page fully outside i_size? (truncate in progress) */ - offset = inode->i_size & (PAGE_CACHE_SIZE-1); + offset = i_size & (PAGE_CACHE_SIZE-1); if (page->index >= end_index+1 || !offset) { /* * The page may have dirty, unmapped buffers. For example, diff -rupN -X /home/daniel/dontdiff linux-2.5.68/fs/ext3/inode.c linux-2.5.68-isize/fs/ext3/inode.c --- linux-2.5.68/fs/ext3/inode.c Sat Apr 19 19:50:07 2003 +++ linux-2.5.68-isize/fs/ext3/inode.c Thu Apr 24 14:32:28 2003 @@ -1163,7 +1163,7 @@ static int ext3_commit_write(struct file if (!partial) SetPageUptodate(page); if (pos > inode->i_size) - inode->i_size = pos; + i_size_write(inode, pos); EXT3_I(inode)->i_state |= EXT3_STATE_JDATA; if (inode->i_size > EXT3_I(inode)->i_disksize) { EXT3_I(inode)->i_disksize = inode->i_size; @@ -1488,7 +1488,7 @@ out_stop: loff_t end = offset + ret; if (end > inode->i_size) { ei->i_disksize = end; - inode->i_size = end; + i_size_write(inode, end); err = ext3_mark_inode_dirty(handle, inode); if (!ret) ret = err; diff -rupN -X /home/daniel/dontdiff linux-2.5.68/fs/inode.c linux-2.5.68-isize/fs/inode.c --- linux-2.5.68/fs/inode.c Sat Apr 19 19:51:13 2003 +++ linux-2.5.68-isize/fs/inode.c Thu Apr 24 14:32:28 2003 @@ -188,6 +188,7 @@ void inode_init_once(struct inode *inode INIT_LIST_HEAD(&inode->i_data.i_mmap); INIT_LIST_HEAD(&inode->i_data.i_mmap_shared); spin_lock_init(&inode->i_lock); + i_size_ordered_init(inode); } static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) diff -rupN -X /home/daniel/dontdiff linux-2.5.68/fs/ioctl.c linux-2.5.68-isize/fs/ioctl.c --- linux-2.5.68/fs/ioctl.c Sat Apr 19 19:48:55 2003 +++ linux-2.5.68-isize/fs/ioctl.c Thu Apr 24 14:32:28 2003 @@ -40,7 +40,7 @@ static int file_ioctl(struct file *filp, return -EBADF; return put_user(inode->i_sb->s_blocksize, (int *) arg); case FIONREAD: - return put_user(inode->i_size - filp->f_pos, (int *) arg); + return put_user(i_size_read(inode) - filp->f_pos, (int *) arg); } if (filp->f_op && filp->f_op->ioctl) return filp->f_op->ioctl(inode, filp, cmd, arg); diff -rupN -X /home/daniel/dontdiff linux-2.5.68/fs/libfs.c linux-2.5.68-isize/fs/libfs.c --- linux-2.5.68/fs/libfs.c Sat Apr 19 19:48:48 2003 +++ linux-2.5.68-isize/fs/libfs.c Thu Apr 24 14:32:28 2003 @@ -327,8 +327,12 @@ int simple_commit_write(struct file *fil struct inode *inode = page->mapping->host; loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to; + /* + * No need to use i_size_read() here, the i_size + * cannot change under us because we hold the i_sem. + */ if (pos > inode->i_size) - inode->i_size = pos; + i_size_write(inode, pos); set_page_dirty(page); return 0; } diff -rupN -X /home/daniel/dontdiff linux-2.5.68/fs/locks.c linux-2.5.68-isize/fs/locks.c --- linux-2.5.68/fs/locks.c Sat Apr 19 19:51:08 2003 +++ linux-2.5.68-isize/fs/locks.c Thu Apr 24 14:32:28 2003 @@ -285,7 +285,7 @@ static int flock_to_posix_lock(struct fi start = filp->f_pos; break; case 2: /*SEEK_END*/ - start = filp->f_dentry->d_inode->i_size; + start = i_size_read(filp->f_dentry->d_inode); break; default: return -EINVAL; @@ -335,7 +335,7 @@ static int flock64_to_posix_lock(struct start = filp->f_pos; break; case 2: /*SEEK_END*/ - start = filp->f_dentry->d_inode->i_size; + start = i_size_read(filp->f_dentry->d_inode); break; default: return -EINVAL; diff -rupN -X /home/daniel/dontdiff linux-2.5.68/fs/mpage.c linux-2.5.68-isize/fs/mpage.c --- linux-2.5.68/fs/mpage.c Sat Apr 19 19:48:55 2003 +++ linux-2.5.68-isize/fs/mpage.c Thu Apr 24 14:32:28 2003 @@ -227,7 +227,7 @@ do_mpage_readpage(struct bio *bio, struc goto confused; block_in_file = page->index << (PAGE_CACHE_SHIFT - blkbits); - last_block = (inode->i_size + blocksize - 1) >> blkbits; + last_block = (i_size_read(inode) + blocksize - 1) >> blkbits; bh.b_page = page; for (page_block = 0; page_block < blocks_per_page; @@ -459,7 +459,7 @@ mpage_writepage(struct bio *bio, struct */ BUG_ON(!PageUptodate(page)); block_in_file = page->index << (PAGE_CACHE_SHIFT - blkbits); - last_block = (inode->i_size - 1) >> blkbits; + last_block = (i_size_read(inode) - 1) >> blkbits; map_bh.b_page = page; for (page_block = 0; page_block < blocks_per_page; ) { @@ -489,9 +489,9 @@ mpage_writepage(struct bio *bio, struct first_unmapped = page_block; - end_index = inode->i_size >> PAGE_CACHE_SHIFT; + end_index = i_size_read(inode) >> PAGE_CACHE_SHIFT; if (page->index >= end_index) { - unsigned offset = inode->i_size & (PAGE_CACHE_SIZE - 1); + unsigned offset = i_size_read(inode) & (PAGE_CACHE_SIZE - 1); char *kaddr; if (page->index > end_index || !offset) diff -rupN -X /home/daniel/dontdiff linux-2.5.68/fs/open.c linux-2.5.68-isize/fs/open.c --- linux-2.5.68/fs/open.c Sat Apr 19 19:48:50 2003 +++ linux-2.5.68-isize/fs/open.c Thu Apr 24 14:32:28 2003 @@ -908,7 +908,7 @@ asmlinkage long sys_vhangup(void) */ int generic_file_open(struct inode * inode, struct file * filp) { - if (!(filp->f_flags & O_LARGEFILE) && inode->i_size > MAX_NON_LFS) + if (!(filp->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS) return -EFBIG; return 0; } diff -rupN -X /home/daniel/dontdiff linux-2.5.68/fs/quota_v1.c linux-2.5.68-isize/fs/quota_v1.c --- linux-2.5.68/fs/quota_v1.c Sat Apr 19 19:50:32 2003 +++ linux-2.5.68-isize/fs/quota_v1.c Thu Apr 24 14:32:28 2003 @@ -132,12 +132,14 @@ static int v1_check_quota_file(struct su mm_segment_t fs; ssize_t size; loff_t offset = 0; + loff_t isize; static const uint quota_magics[] = V2_INITQMAGICS; - if (!inode->i_size) + isize = i_size_read(inode); + if (!isize) return 0; - blocks = inode->i_size >> BLOCK_SIZE_BITS; - off = inode->i_size & (BLOCK_SIZE - 1); + blocks = isize >> BLOCK_SIZE_BITS; + off = isize & (BLOCK_SIZE - 1); if ((blocks % sizeof(struct v1_disk_dqblk) * BLOCK_SIZE + off) % sizeof(struct v1_disk_dqblk)) return 0; /* Doublecheck whether we didn't get file with new format - with old quotactl() this could happen */ diff -rupN -X /home/daniel/dontdiff linux-2.5.68/fs/stat.c linux-2.5.68-isize/fs/stat.c --- linux-2.5.68/fs/stat.c Sat Apr 19 19:48:53 2003 +++ linux-2.5.68-isize/fs/stat.c Thu Apr 24 14:32:28 2003 @@ -28,7 +28,7 @@ void generic_fillattr(struct inode *inod stat->atime = inode->i_atime; stat->mtime = inode->i_mtime; stat->ctime = inode->i_ctime; - stat->size = inode->i_size; + stat->size = i_size_read(inode); stat->blocks = inode->i_blocks; stat->blksize = inode->i_blksize; } diff -rupN -X /home/daniel/dontdiff linux-2.5.68/include/linux/fs.h linux-2.5.68-isize/include/linux/fs.h --- linux-2.5.68/include/linux/fs.h Sat Apr 19 19:48:56 2003 +++ linux-2.5.68-isize/include/linux/fs.h Thu Apr 24 14:32:28 2003 @@ -349,6 +349,17 @@ struct block_device { struct gendisk * bd_disk; }; +/* + * Use sequence counter to get consistent i_size on 32-bit processors. + */ +#if BITS_PER_LONG==32 && defined(CONFIG_SMP) +#include <linux/seqlock.h> +#define __NEED_I_SIZE_ORDERED +#define i_size_ordered_init(inode) seqcnt_init(&inode->i_size_seqcnt) +#else +#define i_size_ordered_init(inode) do { } while (0) +#endif + struct inode { struct hlist_node i_hash; struct list_head i_list; @@ -397,7 +408,59 @@ struct inode { union { void *generic_ip; } u; +#ifdef __NEED_I_SIZE_ORDERED + seqcnt_t i_size_seqcnt; +#endif }; + +/* + * NOTE: in a 32bit arch with a preemptable kernel and + * an UP compile the i_size_read/write must be atomic + * with respect to the local cpu (unlike with preempt disabled), + * but they don't need to be atomic with respect to other cpus like in + * true SMP (so they need either to either locally disable irq around + * the read or for example on x86 they can be still implemented as a + * cmpxchg8b without the need of the lock prefix). For SMP compiles + * and 64bit archs it makes no difference if preempt is enabled or not. + */ +static inline loff_t i_size_read(struct inode * inode) +{ +#if BITS_PER_LONG==32 && defined(CONFIG_SMP) + loff_t i_size; + unsigned int seq; + + do { + seq = read_seqcntbegin(&inode->i_size_seqcnt); + i_size = inode->i_size; + } while (read_seqcntretry(&inode->i_size_seqcnt, seq)); + return i_size; +#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT) + loff_t i_size; + + preempt_disable(); + i_size = inode->i_size; + preempt_enable(); + return i_size; +#else + return inode->i_size; +#endif +} + + +static inline void i_size_write(struct inode * inode, loff_t i_size) +{ +#if BITS_PER_LONG==32 && defined(CONFIG_SMP) + write_seqcntbegin(&inode->i_size_seqcnt); + inode->i_size = i_size; + write_seqcntend(&inode->i_size_seqcnt); +#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT) + preempt_disable(); + inode->i_size = i_size; + preempt_enable(); +#else + inode->i_size = i_size; +#endif +} struct fown_struct { rwlock_t lock; /* protects pid, uid, euid fields */ diff -rupN -X /home/daniel/dontdiff linux-2.5.68/ipc/shm.c linux-2.5.68-isize/ipc/shm.c --- linux-2.5.68/ipc/shm.c Sat Apr 19 19:49:31 2003 +++ linux-2.5.68-isize/ipc/shm.c Thu Apr 24 14:32:28 2003 @@ -691,7 +691,7 @@ asmlinkage long sys_shmat (int shmid, ch } file = shp->shm_file; - size = file->f_dentry->d_inode->i_size; + size = i_size_read(file->f_dentry->d_inode); shp->shm_nattch++; shm_unlock(shp); diff -rupN -X /home/daniel/dontdiff linux-2.5.68/mm/filemap.c linux-2.5.68-isize/mm/filemap.c --- linux-2.5.68/mm/filemap.c Sat Apr 19 19:49:09 2003 +++ linux-2.5.68-isize/mm/filemap.c Thu Apr 24 14:32:28 2003 @@ -558,14 +558,15 @@ void do_generic_mapping_read(struct addr for (;;) { struct page *page; unsigned long end_index, nr, ret; + loff_t isize = i_size_read(inode); - end_index = inode->i_size >> PAGE_CACHE_SHIFT; + end_index = isize >> PAGE_CACHE_SHIFT; if (index > end_index) break; nr = PAGE_CACHE_SIZE; if (index == end_index) { - nr = inode->i_size & ~PAGE_CACHE_MASK; + nr = isize & ~PAGE_CACHE_MASK; if (nr <= offset) break; } @@ -766,7 +767,7 @@ __generic_file_aio_read(struct kiocb *io retval = 0; if (!count) goto out; /* skip atime */ - size = inode->i_size; + size = i_size_read(inode); if (pos < size) { retval = generic_file_direct_IO(READ, iocb, iov, pos, nr_segs); @@ -955,7 +956,7 @@ retry_all: * An external ptracer can access pages that normally aren't * accessible.. */ - size = (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; + size = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; if ((pgoff >= size) && (area->vm_mm == current->mm)) return NULL; @@ -1222,7 +1223,7 @@ static int filemap_populate(struct vm_ar pgoff, len >> PAGE_CACHE_SHIFT); repeat: - size = (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; + size = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; if (pgoff + (len >> PAGE_CACHE_SHIFT) > size) return -EINVAL; @@ -1511,7 +1512,7 @@ inline int generic_write_checks(struct i if (!isblk) { /* FIXME: this is for backwards compatibility with 2.4 */ if (file->f_flags & O_APPEND) - *pos = inode->i_size; + *pos = i_size_read(inode); if (limit != RLIM_INFINITY) { if (*pos >= limit) { @@ -1557,15 +1558,17 @@ inline int generic_write_checks(struct i if (unlikely(*pos + *count > inode->i_sb->s_maxbytes)) *count = inode->i_sb->s_maxbytes - *pos; } else { + loff_t isize; if (bdev_read_only(inode->i_bdev)) return -EPERM; - if (*pos >= inode->i_size) { - if (*count || *pos > inode->i_size) + isize = i_size_read(inode); + if (*pos >= isize) { + if (*count || *pos > isize) return -ENOSPC; } - if (*pos + *count > inode->i_size) - *count = inode->i_size - *pos; + if (*pos + *count > isize) + *count = isize - *pos; } return 0; } @@ -1652,8 +1655,8 @@ generic_file_aio_write_nolock(struct kio iov, pos, nr_segs); if (written > 0) { loff_t end = pos + written; - if (end > inode->i_size && !isblk) { - inode->i_size = end; + if (end > i_size_read(inode) && !isblk) { + i_size_write(inode, end); mark_inode_dirty(inode); } *ppos = end; @@ -1697,14 +1700,15 @@ generic_file_aio_write_nolock(struct kio status = a_ops->prepare_write(file, page, offset, offset+bytes); if (unlikely(status)) { + loff_t isize = i_size_read(inode); /* * prepare_write() may have instantiated a few blocks * outside i_size. Trim these off again. */ unlock_page(page); page_cache_release(page); - if (pos + bytes > inode->i_size) - vmtruncate(inode, inode->i_size); + if (pos + bytes > isize) + vmtruncate(inode, isize); break; } if (likely(nr_segs == 1)) diff -rupN -X /home/daniel/dontdiff linux-2.5.68/mm/memory.c linux-2.5.68-isize/mm/memory.c --- linux-2.5.68/mm/memory.c Sat Apr 19 19:49:25 2003 +++ linux-2.5.68-isize/mm/memory.c Thu Apr 24 14:32:28 2003 @@ -1064,7 +1064,7 @@ int vmtruncate(struct inode * inode, lof if (inode->i_size < offset) goto do_expand; - inode->i_size = offset; + i_size_write(inode, offset); down(&mapping->i_shared_sem); if (list_empty(&mapping->i_mmap) && list_empty(&mapping->i_mmap_shared)) goto out_unlock; @@ -1086,7 +1086,7 @@ do_expand: goto out_sig; if (offset > inode->i_sb->s_maxbytes) goto out; - inode->i_size = offset; + i_size_write(inode, offset); out_truncate: if (inode->i_op && inode->i_op->truncate) diff -rupN -X /home/daniel/dontdiff linux-2.5.68/mm/nommu.c linux-2.5.68-isize/mm/nommu.c --- linux-2.5.68/mm/nommu.c Sat Apr 19 19:50:44 2003 +++ linux-2.5.68-isize/mm/nommu.c Thu Apr 24 14:32:28 2003 @@ -46,7 +46,7 @@ int vmtruncate(struct inode *inode, loff if (inode->i_size < offset) goto do_expand; - inode->i_size = offset; + i_size_write(inode, offset); truncate_inode_pages(mapping, offset); goto out_truncate; @@ -57,7 +57,7 @@ do_expand: goto out_sig; if (offset > inode->i_sb->s_maxbytes) goto out; - inode->i_size = offset; + i_size_write(inode, offset); out_truncate: if (inode->i_op && inode->i_op->truncate) { diff -rupN -X /home/daniel/dontdiff linux-2.5.68/mm/readahead.c linux-2.5.68-isize/mm/readahead.c --- linux-2.5.68/mm/readahead.c Sat Apr 19 19:48:50 2003 +++ linux-2.5.68-isize/mm/readahead.c Thu Apr 24 14:32:28 2003 @@ -208,11 +208,12 @@ __do_page_cache_readahead(struct address LIST_HEAD(page_pool); int page_idx; int ret = 0; + loff_t isize = i_size_read(inode); - if (inode->i_size == 0) + if (isize == 0) goto out; - end_index = ((inode->i_size - 1) >> PAGE_CACHE_SHIFT); + end_index = ((isize - 1) >> PAGE_CACHE_SHIFT); /* * Preallocate as many pages as we will need. diff -rupN -X /home/daniel/dontdiff linux-2.5.68/mm/shmem.c linux-2.5.68-isize/mm/shmem.c --- linux-2.5.68/mm/shmem.c Sat Apr 19 19:49:20 2003 +++ linux-2.5.68-isize/mm/shmem.c Thu Apr 24 14:32:28 2003 @@ -297,7 +297,7 @@ static swp_entry_t *shmem_swp_alloc(stru static const swp_entry_t unswapped = {0}; if (sgp != SGP_WRITE && - ((loff_t) index << PAGE_CACHE_SHIFT) >= inode->i_size) + ((loff_t) index << PAGE_CACHE_SHIFT) >= i_size_read(inode)) return ERR_PTR(-EINVAL); while (!(entry = shmem_swp_entry(info, index, &page))) { @@ -330,7 +330,7 @@ static swp_entry_t *shmem_swp_alloc(stru return ERR_PTR(-ENOMEM); } if (sgp != SGP_WRITE && - ((loff_t) index << PAGE_CACHE_SHIFT) >= inode->i_size) { + ((loff_t) index << PAGE_CACHE_SHIFT) >= i_size_read(inode)) { entry = ERR_PTR(-EINVAL); break; } diff -rupN -X /home/daniel/dontdiff linux-2.5.68/mm/swapfile.c linux-2.5.68-isize/mm/swapfile.c --- linux-2.5.68/mm/swapfile.c Sat Apr 19 19:48:54 2003 +++ linux-2.5.68-isize/mm/swapfile.c Thu Apr 24 14:32:28 2003 @@ -914,7 +914,7 @@ static int setup_swap_extents(struct swa */ probe_block = 0; page_no = 0; - last_block = inode->i_size >> blkbits; + last_block = i_size_read(inode) >> blkbits; while ((probe_block + blocks_per_page) <= last_block && page_no < sis->max) { unsigned block_in_page; @@ -1284,7 +1284,7 @@ asmlinkage long sys_swapon(const char __ } mapping = swap_file->f_dentry->d_inode->i_mapping; - swapfilesize = mapping->host->i_size >> PAGE_SHIFT; + swapfilesize = i_size_read(mapping->host) >> PAGE_SHIFT; error = -EBUSY; for (i = 0 ; i < nr_swapfiles ; i++) {
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