#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); } input type='hidden' name='id' value='1a0bee6c1e788218fd1d141db320db970aace7f0'/>
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authorSergei Shtylyov <sergei.shtylyov@cogentembedded.com>2017-01-29 15:07:34 +0300
committerDavid S. Miller <davem@davemloft.net>2017-01-30 22:05:43 -0500
commit1a0bee6c1e788218fd1d141db320db970aace7f0 (patch)
tree46c4116bc8ef4a7df718516a648597d9e21c15f1 /net/mac802154/main.c
parent63c190429020a9701b42887ac22c28f287f1762f (diff)
sh_eth: rename EESIPR bits
Since the commit b0ca2a21f769 ("sh_eth: Add support of SH7763 to sh_eth") the *enum* declaring the EESIPR bits (interrupt mask) went out of sync with the *enum* declaring the EESR bits (interrupt status) WRT bit naming and formatting. I'd like to restore the consistency by using EESIPR as the bit name prefix, renaming the *enum* to EESIPR_BIT, and (finally) renaming the bits according to the available Renesas SH77{34|63} manuals; additionally, reconstruct couple names using the EESR bit declaration above... Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mac802154/main.c')