OMAP2 clock: convert clock24xx.h to clock2xxx_data.c, opp2xxx*

[safe/jmp/linux-2.6] / fs / ramfs / file-nommu.c

diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index 237fe8b..32fae40 100644 (file)
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -18,9 +18,9 @@
 #include <linux/string.h>
 #include <linux/backing-dev.h>
 #include <linux/ramfs.h>
-#include <linux/quotaops.h>
 #include <linux/pagevec.h>
 #include <linux/mman.h>
+#include <linux/sched.h>
 
 #include <asm/uaccess.h>
 #include "internal.h"
@@ -29,8 +29,8 @@ static int ramfs_nommu_setattr(struct dentry *, struct iattr *);
 
 const struct address_space_operations ramfs_aops = {
        .readpage               = simple_readpage,
-       .prepare_write          = simple_prepare_write,
-       .commit_write           = simple_commit_write,
+       .write_begin            = simple_write_begin,
+       .write_end              = simple_write_end,
        .set_page_dirty         = __set_page_dirty_no_writeback,
 };
 
@@ -43,6 +43,7 @@ const struct file_operations ramfs_file_operations = {
        .aio_write              = generic_file_aio_write,
        .fsync                  = simple_sync_file,
        .splice_read            = generic_file_splice_read,
+       .splice_write           = generic_file_splice_write,
        .llseek                 = generic_file_llseek,
 };
 
@@ -57,9 +58,8 @@ const struct inode_operations ramfs_file_inode_operations = {
  * size 0 on the assumption that it's going to be used for an mmap of shared
  * memory
  */
-static int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize)
+int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize)
 {
-       struct pagevec lru_pvec;
        unsigned long npages, xpages, loop, limit;
        struct page *pages;
        unsigned order;
@@ -69,14 +69,11 @@ static int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize)
        /* make various checks */
        order = get_order(newsize);
        if (unlikely(order >= MAX_ORDER))
-               goto too_big;
+               return -EFBIG;
 
-       limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
-       if (limit != RLIM_INFINITY && newsize > limit)
-               goto fsize_exceeded;
-
-       if (newsize > inode->i_sb->s_maxbytes)
-               goto too_big;
+       ret = inode_newsize_ok(inode, newsize);
+       if (ret)
+               return ret;
 
        i_size_write(inode, newsize);
 
@@ -102,32 +99,25 @@ static int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize)
        memset(data, 0, newsize);
 
        /* attach all the pages to the inode's address space */
-       pagevec_init(&lru_pvec, 0);
        for (loop = 0; loop < npages; loop++) {
                struct page *page = pages + loop;
 
-               ret = add_to_page_cache(page, inode->i_mapping, loop, GFP_KERNEL);
+               ret = add_to_page_cache_lru(page, inode->i_mapping, loop,
+                                       GFP_KERNEL);
                if (ret < 0)
                        goto add_error;
 
-               if (!pagevec_add(&lru_pvec, page))
-                       __pagevec_lru_add(&lru_pvec);
+               /* prevent the page from being discarded on memory pressure */
+               SetPageDirty(page);
 
                unlock_page(page);
        }
 
-       pagevec_lru_add(&lru_pvec);
        return 0;
 
- fsize_exceeded:
-       send_sig(SIGXFSZ, current, 0);
- too_big:
-       return -EFBIG;
-
- add_error:
-       page_cache_release(pages + loop);
-       for (loop++; loop < npages; loop++)
-               __free_page(pages + loop);
+add_error:
+       while (loop < npages)
+               __free_page(pages + loop++);
        return ret;
 }
 
@@ -200,11 +190,6 @@ static int ramfs_nommu_setattr(struct dentry *dentry, struct iattr *ia)
        if (ret)
                return ret;
 
-       /* by providing our own setattr() method, we skip this quotaism */
-       if ((old_ia_valid & ATTR_UID && ia->ia_uid != inode->i_uid) ||
-           (old_ia_valid & ATTR_GID && ia->ia_gid != inode->i_gid))
-               ret = DQUOT_TRANSFER(inode, ia) ? -EDQUOT : 0;
-
        /* pick out size-changing events */
        if (ia->ia_valid & ATTR_SIZE) {
                loff_t size = i_size_read(inode);
@@ -261,11 +246,11 @@ unsigned long ramfs_nommu_get_unmapped_area(struct file *file,
        ret = -ENOMEM;
        pages = kzalloc(lpages * sizeof(struct page *), GFP_KERNEL);
        if (!pages)
-               goto out;
+               goto out_free;
 
        nr = find_get_pages(inode->i_mapping, pgoff, lpages, pages);
        if (nr != lpages)
-               goto out; /* leave if some pages were missing */
+               goto out_free_pages; /* leave if some pages were missing */
 
        /* check the pages for physical adjacency */
        ptr = pages;
@@ -273,19 +258,18 @@ unsigned long ramfs_nommu_get_unmapped_area(struct file *file,
        page++;
        for (loop = lpages; loop > 1; loop--)
                if (*ptr++ != page++)
-                       goto out;
+                       goto out_free_pages;
 
        /* okay - all conditions fulfilled */
        ret = (unsigned long) page_address(pages[0]);
 
- out:
-       if (pages) {
-               ptr = pages;
-               for (loop = lpages; loop > 0; loop--)
-                       put_page(*ptr++);
-               kfree(pages);
-       }
-
+out_free_pages:
+       ptr = pages;
+       for (loop = nr; loop > 0; loop--)
+               put_page(*ptr++);
+out_free:
+       kfree(pages);
+out:
        return ret;
 }