diff options
Diffstat (limited to 'fs/xfs/xfs_linux.h')
| -rw-r--r-- | fs/xfs/xfs_linux.h | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h index e9d317a3dafe..8f07c9f6157f 100644 --- a/fs/xfs/xfs_linux.h +++ b/fs/xfs/xfs_linux.h @@ -21,15 +21,13 @@ typedef __u32 xfs_nlink_t; #include "xfs_types.h" -#include "kmem.h" -#include "mrlock.h" - #include <linux/semaphore.h> #include <linux/mm.h> #include <linux/sched/mm.h> #include <linux/kernel.h> #include <linux/blkdev.h> #include <linux/slab.h> +#include <linux/vmalloc.h> #include <linux/crc32c.h> #include <linux/module.h> #include <linux/mutex.h> @@ -51,6 +49,7 @@ typedef __u32 xfs_nlink_t; #include <linux/notifier.h> #include <linux/delay.h> #include <linux/log2.h> +#include <linux/rwsem.h> #include <linux/spinlock.h> #include <linux/random.h> #include <linux/ctype.h> @@ -82,6 +81,7 @@ typedef __u32 xfs_nlink_t; #include "xfs_buf.h" #include "xfs_message.h" #include "xfs_drain.h" +#include "xfs_hooks.h" #ifdef __BIG_ENDIAN #define XFS_NATIVE_HOST 1 @@ -198,6 +198,18 @@ static inline uint64_t howmany_64(uint64_t x, uint32_t y) return x; } +/* If @b is a power of 2, return log2(b). Else return -1. */ +static inline int8_t log2_if_power2(unsigned long b) +{ + return is_power_of_2(b) ? ilog2(b) : -1; +} + +/* If @b is a power of 2, return a mask of the lower bits, else return zero. */ +static inline unsigned long long mask64_if_power2(unsigned long b) +{ + return is_power_of_2(b) ? b - 1 : 0; +} + int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count, char *data, enum req_op op); @@ -257,4 +269,15 @@ int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count, # define PTR_FMT "%p" #endif +/* + * Helper for IO routines to grab backing pages from allocated kernel memory. + */ +static inline struct page * +kmem_to_page(void *addr) +{ + if (is_vmalloc_addr(addr)) + return vmalloc_to_page(addr); + return virt_to_page(addr); +} + #endif /* __XFS_LINUX__ */ |