diff options
Diffstat (limited to 'mm/truncate.c')
| -rw-r--r-- | mm/truncate.c | 39 |
1 files changed, 16 insertions, 23 deletions
diff --git a/mm/truncate.c b/mm/truncate.c index 12e1579f9165..ccc3ecf7cb98 100644 --- a/mm/truncate.c +++ b/mm/truncate.c | |||
| @@ -267,8 +267,21 @@ void truncate_inode_pages(struct address_space *mapping, loff_t lstart) | |||
| 267 | } | 267 | } |
| 268 | EXPORT_SYMBOL(truncate_inode_pages); | 268 | EXPORT_SYMBOL(truncate_inode_pages); |
| 269 | 269 | ||
| 270 | unsigned long __invalidate_mapping_pages(struct address_space *mapping, | 270 | /** |
| 271 | pgoff_t start, pgoff_t end, bool be_atomic) | 271 | * invalidate_mapping_pages - Invalidate all the unlocked pages of one inode |
| 272 | * @mapping: the address_space which holds the pages to invalidate | ||
| 273 | * @start: the offset 'from' which to invalidate | ||
| 274 | * @end: the offset 'to' which to invalidate (inclusive) | ||
| 275 | * | ||
| 276 | * This function only removes the unlocked pages, if you want to | ||
| 277 | * remove all the pages of one inode, you must call truncate_inode_pages. | ||
| 278 | * | ||
| 279 | * invalidate_mapping_pages() will not block on IO activity. It will not | ||
| 280 | * invalidate pages which are dirty, locked, under writeback or mapped into | ||
| 281 | * pagetables. | ||
| 282 | */ | ||
| 283 | unsigned long invalidate_mapping_pages(struct address_space *mapping, | ||
| 284 | pgoff_t start, pgoff_t end) | ||
| 272 | { | 285 | { |
| 273 | struct pagevec pvec; | 286 | struct pagevec pvec; |
| 274 | pgoff_t next = start; | 287 | pgoff_t next = start; |
| @@ -309,30 +322,10 @@ unlock: | |||
| 309 | break; | 322 | break; |
| 310 | } | 323 | } |
| 311 | pagevec_release(&pvec); | 324 | pagevec_release(&pvec); |
| 312 | if (likely(!be_atomic)) | 325 | cond_resched(); |
| 313 | cond_resched(); | ||
| 314 | } | 326 | } |
| 315 | return ret; | 327 | return ret; |
| 316 | } | 328 | } |
| 317 | |||
| 318 | /** | ||
| 319 | * invalidate_mapping_pages - Invalidate all the unlocked pages of one inode | ||
| 320 | * @mapping: the address_space which holds the pages to invalidate | ||
| 321 | * @start: the offset 'from' which to invalidate | ||
| 322 | * @end: the offset 'to' which to invalidate (inclusive) | ||
| 323 | * | ||
| 324 | * This function only removes the unlocked pages, if you want to | ||
| 325 | * remove all the pages of one inode, you must call truncate_inode_pages. | ||
| 326 | * | ||
| 327 | * invalidate_mapping_pages() will not block on IO activity. It will not | ||
| 328 | * invalidate pages which are dirty, locked, under writeback or mapped into | ||
| 329 | * pagetables. | ||
| 330 | */ | ||
| 331 | unsigned long invalidate_mapping_pages(struct address_space *mapping, | ||
| 332 | pgoff_t start, pgoff_t end) | ||
| 333 | { | ||
| 334 | return __invalidate_mapping_pages(mapping, start, end, false); | ||
| 335 | } | ||
| 336 | EXPORT_SYMBOL(invalidate_mapping_pages); | 329 | EXPORT_SYMBOL(invalidate_mapping_pages); |
| 337 | 330 | ||
| 338 | /* | 331 | /* |
