From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/include/linux/shmem_fs.h | 85 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 kernel/include/linux/shmem_fs.h (limited to 'kernel/include/linux/shmem_fs.h') diff --git a/kernel/include/linux/shmem_fs.h b/kernel/include/linux/shmem_fs.h new file mode 100644 index 000000000..50777b5b1 --- /dev/null +++ b/kernel/include/linux/shmem_fs.h @@ -0,0 +1,85 @@ +#ifndef __SHMEM_FS_H +#define __SHMEM_FS_H + +#include +#include +#include +#include +#include +#include + +/* inode in-kernel data */ + +struct shmem_inode_info { + spinlock_t lock; + unsigned int seals; /* shmem seals */ + unsigned long flags; + unsigned long alloced; /* data pages alloced to file */ + union { + unsigned long swapped; /* subtotal assigned to swap */ + char *symlink; /* unswappable short symlink */ + }; + struct shared_policy policy; /* NUMA memory alloc policy */ + struct list_head swaplist; /* chain of maybes on swap */ + struct simple_xattrs xattrs; /* list of xattrs */ + struct inode vfs_inode; +}; + +struct shmem_sb_info { + unsigned long max_blocks; /* How many blocks are allowed */ + struct percpu_counter used_blocks; /* How many are allocated */ + unsigned long max_inodes; /* How many inodes are allowed */ + unsigned long free_inodes; /* How many are left for allocation */ + spinlock_t stat_lock; /* Serialize shmem_sb_info changes */ + kuid_t uid; /* Mount uid for root directory */ + kgid_t gid; /* Mount gid for root directory */ + umode_t mode; /* Mount mode for root directory */ + struct mempolicy *mpol; /* default memory policy for mappings */ +}; + +static inline struct shmem_inode_info *SHMEM_I(struct inode *inode) +{ + return container_of(inode, struct shmem_inode_info, vfs_inode); +} + +/* + * Functions in mm/shmem.c called directly from elsewhere: + */ +extern int shmem_init(void); +extern int shmem_fill_super(struct super_block *sb, void *data, int silent); +extern struct file *shmem_file_setup(const char *name, + loff_t size, unsigned long flags); +extern struct file *shmem_kernel_file_setup(const char *name, loff_t size, + unsigned long flags); +extern int shmem_zero_setup(struct vm_area_struct *); +extern int shmem_lock(struct file *file, int lock, struct user_struct *user); +extern bool shmem_mapping(struct address_space *mapping); +extern void shmem_unlock_mapping(struct address_space *mapping); +extern struct page *shmem_read_mapping_page_gfp(struct address_space *mapping, + pgoff_t index, gfp_t gfp_mask); +extern void shmem_truncate_range(struct inode *inode, loff_t start, loff_t end); +extern int shmem_unuse(swp_entry_t entry, struct page *page); + +static inline struct page *shmem_read_mapping_page( + struct address_space *mapping, pgoff_t index) +{ + return shmem_read_mapping_page_gfp(mapping, index, + mapping_gfp_mask(mapping)); +} + +#ifdef CONFIG_TMPFS + +extern int shmem_add_seals(struct file *file, unsigned int seals); +extern int shmem_get_seals(struct file *file); +extern long shmem_fcntl(struct file *file, unsigned int cmd, unsigned long arg); + +#else + +static inline long shmem_fcntl(struct file *f, unsigned int c, unsigned long a) +{ + return -EINVAL; +} + +#endif + +#endif -- cgit 1.2.3-korg