diff options
Diffstat (limited to 'mm/util.c')
| -rw-r--r-- | mm/util.c | 44 |
1 files changed, 0 insertions, 44 deletions
| @@ -4,10 +4,6 @@ | |||
| 4 | #include <linux/module.h> | 4 | #include <linux/module.h> |
| 5 | #include <linux/err.h> | 5 | #include <linux/err.h> |
| 6 | #include <linux/sched.h> | 6 | #include <linux/sched.h> |
| 7 | #include <linux/hugetlb.h> | ||
| 8 | #include <linux/syscalls.h> | ||
| 9 | #include <linux/mman.h> | ||
| 10 | #include <linux/file.h> | ||
| 11 | #include <asm/uaccess.h> | 7 | #include <asm/uaccess.h> |
| 12 | 8 | ||
| 13 | #define CREATE_TRACE_POINTS | 9 | #define CREATE_TRACE_POINTS |
| @@ -272,46 +268,6 @@ int __attribute__((weak)) get_user_pages_fast(unsigned long start, | |||
| 272 | } | 268 | } |
| 273 | EXPORT_SYMBOL_GPL(get_user_pages_fast); | 269 | EXPORT_SYMBOL_GPL(get_user_pages_fast); |
| 274 | 270 | ||
| 275 | SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, | ||
| 276 | unsigned long, prot, unsigned long, flags, | ||
| 277 | unsigned long, fd, unsigned long, pgoff) | ||
| 278 | { | ||
| 279 | struct file * file = NULL; | ||
| 280 | unsigned long retval = -EBADF; | ||
| 281 | |||
| 282 | if (!(flags & MAP_ANONYMOUS)) { | ||
| 283 | if (unlikely(flags & MAP_HUGETLB)) | ||
| 284 | return -EINVAL; | ||
| 285 | file = fget(fd); | ||
| 286 | if (!file) | ||
| 287 | goto out; | ||
| 288 | } else if (flags & MAP_HUGETLB) { | ||
| 289 | struct user_struct *user = NULL; | ||
| 290 | /* | ||
| 291 | * VM_NORESERVE is used because the reservations will be | ||
| 292 | * taken when vm_ops->mmap() is called | ||
| 293 | * A dummy user value is used because we are not locking | ||
| 294 | * memory so no accounting is necessary | ||
| 295 | */ | ||
| 296 | len = ALIGN(len, huge_page_size(&default_hstate)); | ||
| 297 | file = hugetlb_file_setup(HUGETLB_ANON_FILE, len, VM_NORESERVE, | ||
| 298 | &user, HUGETLB_ANONHUGE_INODE); | ||
| 299 | if (IS_ERR(file)) | ||
| 300 | return PTR_ERR(file); | ||
| 301 | } | ||
| 302 | |||
| 303 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | ||
| 304 | |||
| 305 | down_write(¤t->mm->mmap_sem); | ||
| 306 | retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | ||
| 307 | up_write(¤t->mm->mmap_sem); | ||
| 308 | |||
| 309 | if (file) | ||
| 310 | fput(file); | ||
| 311 | out: | ||
| 312 | return retval; | ||
| 313 | } | ||
| 314 | |||
| 315 | /* Tracepoints definitions. */ | 271 | /* Tracepoints definitions. */ |
| 316 | EXPORT_TRACEPOINT_SYMBOL(kmalloc); | 272 | EXPORT_TRACEPOINT_SYMBOL(kmalloc); |
| 317 | EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc); | 273 | EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc); |
