#include #include #include #include #include #include #include #include #include #include #include int nr_allocated; int preempt_count; struct kmem_cache { pthread_mutex_t lock; int size; int nr_objs; void *objs; void (*ctor)(void *); }; void *mempool_alloc(mempool_t *pool, int gfp_mask) { return pool->alloc(gfp_mask, pool->data); } void mempool_free(void *element, mempool_t *pool) { pool->free(element, pool->data); } mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn, mempool_free_t *free_fn, void *pool_data) { mempool_t *ret = malloc(sizeof(*ret)); ret->alloc = alloc_fn; ret->free = free_fn; ret->data = pool_data; return ret; } void *kmem_cache_alloc(struct kmem_cache *cachep, int flags) { struct radix_tree_node *node; if (flags & __GFP_NOWARN) return NULL; pthread_mutex_lock(&cachep->lock); if (cachep->nr_objs) { cachep->nr_objs--; node = cachep->objs; cachep->objs = node->private_data; pthread_mutex_unlock(&cachep->lock); node->private_data = NULL; } else { pthread_mutex_unlock(&cachep->lock); node = malloc(cachep->size); if (cachep->ctor) cachep->ctor(node); } uatomic_inc(&nr_allocated); return node; } void kmem_cache_free(struct kmem_cache *cachep, void *objp) { assert(objp); uatomic_dec(&nr_allocated); pthread_mutex_lock(&cachep->lock); if (cachep->nr_objs > 10) { memset(objp, POISON_FREE, cachep->size); free(objp); } else { struct radix_tree_node *node = objp; cachep->nr_objs++; node->private_data = cachep->objs; cachep->objs = node; } pthread_mutex_unlock(&cachep->lock); } void *kmalloc(size_t size, gfp_t gfp) { void *ret = malloc(size); uatomic_inc(&nr_allocated); return ret; } void kfree(void *p) { if (!p) return; uatomic_dec(&nr_allocated); free(p); } struct kmem_cache * kmem_cache_create(const char *name, size_t size, size_t offset, unsigned long flags, void (*ctor)(void *)) { struct kmem_cache *ret = malloc(sizeof(*ret)); pthread_mutex_init(&ret->lock, NULL); ret->size = size; ret->nr_objs = 0; ret->objs = NULL; ret->ctor = ctor; return ret; } og/include/dt-bindings/spmi'>
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authorChristoph Hellwig <hch@lst.de>2017-01-30 13:15:41 +0100
committerBjorn Helgaas <bhelgaas@google.com>2017-02-02 10:35:46 -0600
commitdfef358bd1beb4e7b5c94eca944be9cd23dfc752 (patch)
treeb9a2afb38a4c2ac8ad31f49ec0d71fe9e5b1994c /include/dt-bindings/spmi
parent030305d69fc6963c16003f50d7e8d74b02d0a143 (diff)
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ affinity code, which we root caused to the qla2xxx driver assigning all its MSI-X vectors to the pre and post vectors, and not having any left for the actually spread IRQs. Fix this issue by not asking for affinity assignment when there are no vectors to assign left. Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()") Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com Reported-by: Bart Van Assche <bart.vanassche@sandisk.com> Tested-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'include/dt-bindings/spmi')