Merge branch 'linus' into tracing/core

Merge reason: update to upstream tracing facilities

Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 90 insertions, 25 deletions

diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index 5d7c7ececa6..ebb2c417912 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -18,7 +18,6 @@
 #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>
 
@@ -60,7 +59,6 @@ const struct inode_operations ramfs_file_inode_operations = {
  */
 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;
@@ -103,24 +101,20 @@ 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_file(&lru_pvec);
-
 		/* prevent the page from being discarded on memory pressure */
 		SetPageDirty(page);
 
 		unlock_page(page);
 	}
 
-	pagevec_lru_add_file(&lru_pvec);
 	return 0;
 
  fsize_exceeded:
@@ -129,10 +123,8 @@ int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize)
 	return -EFBIG;
 
  add_error:
-	pagevec_lru_add_file(&lru_pvec);
-	page_cache_release(pages + loop);
-	for (loop++; loop < npages; loop++)
-		__free_page(pages + loop);
+	while (loop < npages)
+		__free_page(pages + loop++);
 	return ret;
 }
 
@@ -205,11 +197,6 @@ 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);
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index b7e6ac706b8..a404fb88e45 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -33,12 +33,15 @@
 #include <linux/backing-dev.h>
 #include <linux/ramfs.h>
 #include <linux/sched.h>
+#include <linux/parser.h>
 #include <asm/uaccess.h>
 #include "internal.h"
 
 /* some random number */
 #define RAMFS_MAGIC	0x858458f6
 
+#define RAMFS_DEFAULT_MODE	0755
+
 static const struct super_operations ramfs_ops;
 static const struct inode_operations ramfs_dir_inode_operations;
 
@@ -158,12 +161,75 @@ static const struct inode_operations ramfs_dir_inode_operations = {
 static const struct super_operations ramfs_ops = {
 	.statfs		= simple_statfs,
 	.drop_inode	= generic_delete_inode,
+	.show_options	= generic_show_options,
+};
+
+struct ramfs_mount_opts {
+	umode_t mode;
+};
+
+enum {
+	Opt_mode,
+	Opt_err
+};
+
+static const match_table_t tokens = {
+	{Opt_mode, "mode=%o"},
+	{Opt_err, NULL}
+};
+
+struct ramfs_fs_info {
+	struct ramfs_mount_opts mount_opts;
 };
 
+static int ramfs_parse_options(char *data, struct ramfs_mount_opts *opts)
+{
+	substring_t args[MAX_OPT_ARGS];
+	int option;
+	int token;
+	char *p;
+
+	opts->mode = RAMFS_DEFAULT_MODE;
+
+	while ((p = strsep(&data, ",")) != NULL) {
+		if (!*p)
+			continue;
+
+		token = match_token(p, tokens, args);
+		switch (token) {
+		case Opt_mode:
+			if (match_octal(&args[0], &option))
+				return -EINVAL;
+			opts->mode = option & S_IALLUGO;
+			break;
+		default:
+			printk(KERN_ERR "ramfs: bad mount option: %s\n", p);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
 static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
 {
-	struct inode * inode;
-	struct dentry * root;
+	struct ramfs_fs_info *fsi;
+	struct inode *inode = NULL;
+	struct dentry *root;
+	int err;
+
+	save_mount_options(sb, data);
+
+	fsi = kzalloc(sizeof(struct ramfs_fs_info), GFP_KERNEL);
+	if (!fsi) {
+		err = -ENOMEM;
+		goto fail;
+	}
+	sb->s_fs_info = fsi;
+
+	err = ramfs_parse_options(data, &fsi->mount_opts);
+	if (err)
+		goto fail;
 
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
 	sb->s_blocksize = PAGE_CACHE_SIZE;
@@ -171,17 +237,23 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
 	sb->s_magic = RAMFS_MAGIC;
 	sb->s_op = &ramfs_ops;
 	sb->s_time_gran = 1;
-	inode = ramfs_get_inode(sb, S_IFDIR | 0755, 0);
-	if (!inode)
-		return -ENOMEM;
+	inode = ramfs_get_inode(sb, S_IFDIR | fsi->mount_opts.mode, 0);
+	if (!inode) {
+		err = -ENOMEM;
+		goto fail;
+	}
 
 	root = d_alloc_root(inode);
 	if (!root) {
-		iput(inode);
-		return -ENOMEM;
+		err = -ENOMEM;
+		goto fail;
 	}
 	sb->s_root = root;
 	return 0;
+fail:
+	kfree(fsi);
+	iput(inode);
+	return err;
 }
 
 int ramfs_get_sb(struct file_system_type *fs_type,
@@ -197,10 +269,16 @@ static int rootfs_get_sb(struct file_system_type *fs_type,
 			    mnt);
 }
 
+static void ramfs_kill_sb(struct super_block *sb)
+{
+	kfree(sb->s_fs_info);
+	kill_litter_super(sb);
+}
+
 static struct file_system_type ramfs_fs_type = {
 	.name		= "ramfs",
 	.get_sb		= ramfs_get_sb,
-	.kill_sb	= kill_litter_super,
+	.kill_sb	= ramfs_kill_sb,
 };
 static struct file_system_type rootfs_fs_type = {
 	.name		= "rootfs",