Merge remote-tracking branch 'lsk/v3.10/topic/arm64-kgdb' into linux-linaro-lsk

[firefly-linux-kernel-4.4.55.git] / lib / genalloc.c

diff --git a/lib/genalloc.c b/lib/genalloc.c
index b35cfa9bc3d42d9e0303d0ec07c2c473fd64618c..2a39bf62d8c1b71d5862098991b7fb71abbc9faf 100644 (file)
--- a/lib/genalloc.c
+++ b/lib/genalloc.c
@@ -37,6 +37,11 @@
 #include <linux/of_address.h>
 #include <linux/of_device.h>
 
+static inline size_t chunk_size(const struct gen_pool_chunk *chunk)
+{
+       return chunk->end_addr - chunk->start_addr + 1;
+}
+
 static int set_bits_ll(unsigned long *addr, unsigned long mask_to_set)
 {
        unsigned long val, nval;
@@ -188,7 +193,7 @@ int gen_pool_add_virt(struct gen_pool *pool, unsigned long virt, phys_addr_t phy
 
        chunk->phys_addr = phys;
        chunk->start_addr = virt;
-       chunk->end_addr = virt + size;
+       chunk->end_addr = virt + size - 1;
        atomic_set(&chunk->avail, size);
 
        spin_lock(&pool->lock);
@@ -213,7 +218,7 @@ phys_addr_t gen_pool_virt_to_phys(struct gen_pool *pool, unsigned long addr)
 
        rcu_read_lock();
        list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) {
-               if (addr >= chunk->start_addr && addr < chunk->end_addr) {
+               if (addr >= chunk->start_addr && addr <= chunk->end_addr) {
                        paddr = chunk->phys_addr + (addr - chunk->start_addr);
                        break;
                }
@@ -242,7 +247,7 @@ void gen_pool_destroy(struct gen_pool *pool)
                chunk = list_entry(_chunk, struct gen_pool_chunk, next_chunk);
                list_del(&chunk->next_chunk);
 
-               end_bit = (chunk->end_addr - chunk->start_addr) >> order;
+               end_bit = chunk_size(chunk) >> order;
                bit = find_next_bit(chunk->bits, end_bit, 0);
                BUG_ON(bit < end_bit);
 
@@ -283,7 +288,7 @@ unsigned long gen_pool_alloc(struct gen_pool *pool, size_t size)
                if (size > atomic_read(&chunk->avail))
                        continue;
 
-               end_bit = (chunk->end_addr - chunk->start_addr) >> order;
+               end_bit = chunk_size(chunk) >> order;
 retry:
                start_bit = pool->algo(chunk->bits, end_bit, start_bit, nbits,
                                pool->data);
@@ -330,8 +335,8 @@ void gen_pool_free(struct gen_pool *pool, unsigned long addr, size_t size)
        nbits = (size + (1UL << order) - 1) >> order;
        rcu_read_lock();
        list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) {
-               if (addr >= chunk->start_addr && addr < chunk->end_addr) {
-                       BUG_ON(addr + size > chunk->end_addr);
+               if (addr >= chunk->start_addr && addr <= chunk->end_addr) {
+                       BUG_ON(addr + size - 1 > chunk->end_addr);
                        start_bit = (addr - chunk->start_addr) >> order;
                        remain = bitmap_clear_ll(chunk->bits, start_bit, nbits);
                        BUG_ON(remain);
@@ -400,7 +405,7 @@ size_t gen_pool_size(struct gen_pool *pool)
 
        rcu_read_lock();
        list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk)
-               size += chunk->end_addr - chunk->start_addr;
+               size += chunk_size(chunk);
        rcu_read_unlock();
        return size;
 }