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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-18 19:26:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-18 19:26:54 -0700 |
| commit | 814a2bf957739f367cbebfa1b60237387b72d0ee (patch) | |
| tree | 8d65c38d14beb8d6d2dc5b9d7f8dbe63c7cad31a /mm/shmem.c | |
| parent | 237045fc3c67d44088f767dca5a9fa30815eba62 (diff) | |
| parent | f9310b2f9a19b7f16c7b1c1558f8b649b9b933c1 (diff) | |
| download | net-814a2bf957739f367cbebfa1b60237387b72d0ee.tar.gz | |
Merge branch 'akpm' (patches from Andrew)
Merge second patch-bomb from Andrew Morton:
- a couple of hotfixes
- the rest of MM
- a new timer slack control in procfs
- a couple of procfs fixes
- a few misc things
- some printk tweaks
- lib/ updates, notably to radix-tree.
- add my and Nick Piggin's old userspace radix-tree test harness to
tools/testing/radix-tree/. Matthew said it was a godsend during the
radix-tree work he did.
- a few code-size improvements, switching to __always_inline where gcc
screwed up.
- partially implement character sets in sscanf
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (118 commits)
sscanf: implement basic character sets
lib/bug.c: use common WARN helper
param: convert some "on"/"off" users to strtobool
lib: add "on"/"off" support to kstrtobool
lib: update single-char callers of strtobool()
lib: move strtobool() to kstrtobool()
include/linux/unaligned: force inlining of byteswap operations
include/uapi/linux/byteorder, swab: force inlining of some byteswap operations
include/asm-generic/atomic-long.h: force inlining of some atomic_long operations
usb: common: convert to use match_string() helper
ide: hpt366: convert to use match_string() helper
ata: hpt366: convert to use match_string() helper
power: ab8500: convert to use match_string() helper
power: charger_manager: convert to use match_string() helper
drm/edid: convert to use match_string() helper
pinctrl: convert to use match_string() helper
device property: convert to use match_string() helper
lib/string: introduce match_string() helper
radix-tree tests: add test for radix_tree_iter_next
radix-tree tests: add regression3 test
...
Diffstat (limited to 'mm/shmem.c')
| -rw-r--r-- | mm/shmem.c | 49 |
1 files changed, 21 insertions, 28 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index 1acfdbc4bd9e30..9428c51ab2d6b0 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -376,28 +376,23 @@ unsigned long shmem_partial_swap_usage(struct address_space *mapping, rcu_read_lock(); -restart: radix_tree_for_each_slot(slot, &mapping->page_tree, &iter, start) { if (iter.index >= end) break; page = radix_tree_deref_slot(slot); - /* - * This should only be possible to happen at index 0, so we - * don't need to reset the counter, nor do we risk infinite - * restarts. - */ - if (radix_tree_deref_retry(page)) - goto restart; + if (radix_tree_deref_retry(page)) { + slot = radix_tree_iter_retry(&iter); + continue; + } if (radix_tree_exceptional_entry(page)) swapped++; if (need_resched()) { cond_resched_rcu(); - start = iter.index + 1; - goto restart; + slot = radix_tree_iter_next(&iter); } } @@ -1947,12 +1942,13 @@ static void shmem_tag_pins(struct address_space *mapping) start = 0; rcu_read_lock(); -restart: radix_tree_for_each_slot(slot, &mapping->page_tree, &iter, start) { page = radix_tree_deref_slot(slot); if (!page || radix_tree_exception(page)) { - if (radix_tree_deref_retry(page)) - goto restart; + if (radix_tree_deref_retry(page)) { + slot = radix_tree_iter_retry(&iter); + continue; + } } else if (page_count(page) - page_mapcount(page) > 1) { spin_lock_irq(&mapping->tree_lock); radix_tree_tag_set(&mapping->page_tree, iter.index, @@ -1962,8 +1958,7 @@ restart: if (need_resched()) { cond_resched_rcu(); - start = iter.index + 1; - goto restart; + slot = radix_tree_iter_next(&iter); } } rcu_read_unlock(); @@ -2000,14 +1995,15 @@ static int shmem_wait_for_pins(struct address_space *mapping) start = 0; rcu_read_lock(); -restart: radix_tree_for_each_tagged(slot, &mapping->page_tree, &iter, start, SHMEM_TAG_PINNED) { page = radix_tree_deref_slot(slot); if (radix_tree_exception(page)) { - if (radix_tree_deref_retry(page)) - goto restart; + if (radix_tree_deref_retry(page)) { + slot = radix_tree_iter_retry(&iter); + continue; + } page = NULL; } @@ -2032,8 +2028,7 @@ restart: continue_resched: if (need_resched()) { cond_resched_rcu(); - start = iter.index + 1; - goto restart; + slot = radix_tree_iter_next(&iter); } } rcu_read_unlock(); @@ -2823,9 +2818,8 @@ static int shmem_parse_options(char *options, struct shmem_sb_info *sbinfo, if ((value = strchr(this_char,'=')) != NULL) { *value++ = 0; } else { - printk(KERN_ERR - "tmpfs: No value for mount option '%s'\n", - this_char); + pr_err("tmpfs: No value for mount option '%s'\n", + this_char); goto error; } @@ -2880,8 +2874,7 @@ static int shmem_parse_options(char *options, struct shmem_sb_info *sbinfo, if (mpol_parse_str(value, &mpol)) goto bad_val; } else { - printk(KERN_ERR "tmpfs: Bad mount option %s\n", - this_char); + pr_err("tmpfs: Bad mount option %s\n", this_char); goto error; } } @@ -2889,7 +2882,7 @@ static int shmem_parse_options(char *options, struct shmem_sb_info *sbinfo, return 0; bad_val: - printk(KERN_ERR "tmpfs: Bad value '%s' for mount option '%s'\n", + pr_err("tmpfs: Bad value '%s' for mount option '%s'\n", value, this_char); error: mpol_put(mpol); @@ -3286,14 +3279,14 @@ int __init shmem_init(void) error = register_filesystem(&shmem_fs_type); if (error) { - printk(KERN_ERR "Could not register tmpfs\n"); + pr_err("Could not register tmpfs\n"); goto out2; } shm_mnt = kern_mount(&shmem_fs_type); if (IS_ERR(shm_mnt)) { error = PTR_ERR(shm_mnt); - printk(KERN_ERR "Could not kern_mount tmpfs\n"); + pr_err("Could not kern_mount tmpfs\n"); goto out1; } return 0; |