#include #include #include #include #include static DEFINE_SPINLOCK(string_tree_lock); static struct rb_root string_tree = RB_ROOT; struct ceph_string *ceph_find_or_create_string(const char* str, size_t len) { struct ceph_string *cs, *exist; struct rb_node **p, *parent; int ret; exist = NULL; spin_lock(&string_tree_lock); p = &string_tree.rb_node; while (*p) { exist = rb_entry(*p, struct ceph_string, node); ret = ceph_compare_string(exist, str, len); if (ret > 0) p = &(*p)->rb_left; else if (ret < 0) p = &(*p)->rb_right; else break; exist = NULL; } if (exist && !kref_get_unless_zero(&exist->kref)) { rb_erase(&exist->node, &string_tree); RB_CLEAR_NODE(&exist->node); exist = NULL; } spin_unlock(&string_tree_lock); if (exist) return exist; cs = kmalloc(sizeof(*cs) + len + 1, GFP_NOFS); if (!cs) return NULL; kref_init(&cs->kref); cs->len = len; memcpy(cs->str, str, len); cs->str[len] = 0; retry: exist = NULL; parent = NULL; p = &string_tree.rb_node; spin_lock(&string_tree_lock); while (*p) { parent = *p; exist = rb_entry(*p, struct ceph_string, node); ret = ceph_compare_string(exist, str, len); if (ret > 0) p = &(*p)->rb_left; else if (ret < 0) p = &(*p)->rb_right; else break; exist = NULL; } ret = 0; if (!exist) { rb_link_node(&cs->node, parent, p); rb_insert_color(&cs->node, &string_tree); } else if (!kref_get_unless_zero(&exist->kref)) { rb_erase(&exist->node, &string_tree); RB_CLEAR_NODE(&exist->node); ret = -EAGAIN; } spin_unlock(&string_tree_lock); if (ret == -EAGAIN) goto retry; if (exist) { kfree(cs); cs = exist; } return cs; } EXPORT_SYMBOL(ceph_find_or_create_string); void ceph_release_string(struct kref *ref) { struct ceph_string *cs = container_of(ref, struct ceph_string, kref); spin_lock(&string_tree_lock); if (!RB_EMPTY_NODE(&cs->node)) { rb_erase(&cs->node, &string_tree); RB_CLEAR_NODE(&cs->node); } spin_unlock(&string_tree_lock); kfree_rcu(cs, rcu); } EXPORT_SYMBOL(ceph_release_string); bool ceph_strings_empty(void) { return RB_EMPTY_ROOT(&string_tree); } .git/diff/include/dt-bindings/clock/at91.h?h=nds-private-remove&id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>diff
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authorLinus Torvalds <torvalds@linux-foundation.org>2017-01-24 16:54:39 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-24 16:54:39 -0800
commit883af14e67e8b8702b5560aa64c888c0cd0bd66c (patch)
tree74e3a6b53f5fad9f7848ab1b9f6921b7012940a4 /include/dt-bindings/clock/at91.h
parent0263d4ebd94b36280608e296cba39b924b6e832b (diff)
parentaab45453ff5c77200c6da4ac909f7a4392aed17e (diff)
Merge branch 'akpm' (patches from Andrew)
Merge fixes from Andrew Morton: "26 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (26 commits) MAINTAINERS: add Dan Streetman to zbud maintainers MAINTAINERS: add Dan Streetman to zswap maintainers mm: do not export ioremap_page_range symbol for external module mn10300: fix build error of missing fpu_save() romfs: use different way to generate fsid for BLOCK or MTD frv: add missing atomic64 operations mm, page_alloc: fix premature OOM when racing with cpuset mems update mm, page_alloc: move cpuset seqcount checking to slowpath mm, page_alloc: fix fast-path race with cpuset update or removal mm, page_alloc: fix check for NULL preferred_zone kernel/panic.c: add missing \n fbdev: color map copying bounds checking frv: add atomic64_add_unless() mm/mempolicy.c: do not put mempolicy before using its nodemask radix-tree: fix private list warnings Documentation/filesystems/proc.txt: add VmPin mm, memcg: do not retry precharge charges proc: add a schedule point in proc_pid_readdir() mm: alloc_contig: re-allow CMA to compact FS pages mm/slub.c: trace free objects at KERN_INFO ...
Diffstat (limited to 'include/dt-bindings/clock/at91.h')