diff options
Diffstat (limited to 'mm/fadvise.c')
| -rw-r--r-- | mm/fadvise.c | 38 |
1 files changed, 19 insertions, 19 deletions
diff --git a/mm/fadvise.c b/mm/fadvise.c index a47f0f50c89..3bcfd81db45 100644 --- a/mm/fadvise.c +++ b/mm/fadvise.c @@ -17,6 +17,7 @@ #include <linux/fadvise.h> #include <linux/writeback.h> #include <linux/syscalls.h> +#include <linux/swap.h> #include <asm/unistd.h> @@ -24,7 +25,7 @@ * POSIX_FADV_WILLNEED could set PG_Referenced, and POSIX_FADV_NOREUSE could * deactivate the pages and clear PG_Referenced. */ -SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice) +SYSCALL_DEFINE4(fadvise64_64, int, fd, loff_t, offset, loff_t, len, int, advice) { struct fd f = fdget(fd); struct address_space *mapping; @@ -38,7 +39,7 @@ SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice) if (!f.file) return -EBADF; - if (S_ISFIFO(f.file->f_path.dentry->d_inode->i_mode)) { + if (S_ISFIFO(file_inode(f.file)->i_mode)) { ret = -ESPIPE; goto out; } @@ -120,9 +121,22 @@ SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice) start_index = (offset+(PAGE_CACHE_SIZE-1)) >> PAGE_CACHE_SHIFT; end_index = (endbyte >> PAGE_CACHE_SHIFT); - if (end_index >= start_index) - invalidate_mapping_pages(mapping, start_index, + if (end_index >= start_index) { + unsigned long count = invalidate_mapping_pages(mapping, + start_index, end_index); + + /* + * If fewer pages were invalidated than expected then + * it is possible that some of the pages were on + * a per-cpu pagevec for a remote CPU. Drain all + * pagevecs and try again. + */ + if (count < (end_index - start_index + 1)) { + lru_add_drain_all(); + invalidate_mapping_pages(mapping, start_index, end_index); + } + } break; default: ret = -EINVAL; @@ -131,26 +145,12 @@ out: fdput(f); return ret; } -#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS -asmlinkage long SyS_fadvise64_64(long fd, loff_t offset, loff_t len, long advice) -{ - return SYSC_fadvise64_64((int) fd, offset, len, (int) advice); -} -SYSCALL_ALIAS(sys_fadvise64_64, SyS_fadvise64_64); -#endif #ifdef __ARCH_WANT_SYS_FADVISE64 -SYSCALL_DEFINE(fadvise64)(int fd, loff_t offset, size_t len, int advice) +SYSCALL_DEFINE4(fadvise64, int, fd, loff_t, offset, size_t, len, int, advice) { return sys_fadvise64_64(fd, offset, len, advice); } -#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS -asmlinkage long SyS_fadvise64(long fd, loff_t offset, long len, long advice) -{ - return SYSC_fadvise64((int) fd, offset, (size_t)len, (int)advice); -} -SYSCALL_ALIAS(sys_fadvise64, SyS_fadvise64); -#endif #endif |