Merge branch 'akpm' (patches from Andrew Morton)

Merge first patch-bomb from Andrew Morton:
 - Some pidns/fork/exec tweaks
 - OCFS2 updates
 - Most of MM - there remain quite a few memcg parts which depend on
   pending core cgroups changes.  Which might have been already merged -
   I'll check tomorrow...
 - Various misc stuff all over the place
 - A few block bits which I never got around to sending to Jens -
   relatively minor things.
 - MAINTAINERS maintenance
 - A small number of lib/ updates
 - checkpatch updates
 - epoll
 - firmware/dmi-scan
 - Some kprobes work for S390
 - drivers/rtc updates
 - hfsplus feature work
 - vmcore feature work
 - rbtree upgrades
 - AOE updates
 - pktcdvd cleanups
 - PPS
 - memstick
 - w1
 - New "inittmpfs" feature, which does the obvious
 - More IPC work from Davidlohr.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (303 commits)
  lz4: fix compression/decompression signedness mismatch
  ipc: drop ipc_lock_check
  ipc, shm: drop shm_lock_check
  ipc: drop ipc_lock_by_ptr
  ipc, shm: guard against non-existant vma in shmdt(2)
  ipc: document general ipc locking scheme
  ipc,msg: drop msg_unlock
  ipc: rename ids->rw_mutex
  ipc,shm: shorten critical region for shmat
  ipc,shm: cleanup do_shmat pasta
  ipc,shm: shorten critical region for shmctl
  ipc,shm: make shmctl_nolock lockless
  ipc,shm: introduce shmctl_nolock
  ipc: drop ipcctl_pre_down
  ipc,shm: shorten critical region in shmctl_down
  ipc,shm: introduce lockless functions to obtain the ipc object
  initmpfs: use initramfs if rootfstype= or root= specified
  initmpfs: make rootfs use tmpfs when CONFIG_TMPFS enabled
  initmpfs: move rootfs code from fs/ramfs/ to init/
  initmpfs: move bdi setup from init_rootfs to init_ramfs
  ...

1 files changed, 13 insertions, 9 deletions

diff --git a/lib/genalloc.c b/lib/genalloc.c
index b35cfa9bc3d4..26cf20be72b7 100644
--- 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;
@@ -182,13 +187,13 @@ int gen_pool_add_virt(struct gen_pool *pool, unsigned long virt, phys_addr_t phy
         int nbytes = sizeof(struct gen_pool_chunk) +
                                 BITS_TO_LONGS(nbits) * sizeof(long);
 
-        chunk = kmalloc_node(nbytes, GFP_KERNEL | __GFP_ZERO, nid);
+        chunk = kzalloc_node(nbytes, GFP_KERNEL, nid);
         if (unlikely(chunk == NULL))
                 return -ENOMEM;
 
         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;
 }
@@ -519,7 +524,6 @@ struct gen_pool *devm_gen_pool_create(struct device *dev, int min_alloc_order,
 /**
  * dev_get_gen_pool - Obtain the gen_pool (if any) for a device
  * @dev: device to retrieve the gen_pool from
- * @name: Optional name for the gen_pool, usually NULL
  *
  * Returns the gen_pool for the device if one is present, or NULL.
  */