[PATCH] ext4 balloc: say rb_entry not list_entry

The reservations tree is an rb_tree not a list, so it's less confusing to use
rb_entry() than list_entry() - though they're both just container_of().

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index c5589b3..8e7249e 100644 (file)
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -165,7 +165,7 @@ restart:
 
        printk("Block Allocation Reservation Windows Map (%s):\n", fn);
        while (n) {
-               rsv = list_entry(n, struct ext4_reserve_window_node, rsv_node);
+               rsv = rb_entry(n, struct ext4_reserve_window_node, rsv_node);
                if (verbose)
                        printk("reservation window 0x%p "
                               "start:  %llu, end:  %llu\n",
@@ -966,7 +966,7 @@ static int find_next_reservable_window(
 
                prev = rsv;
                next = rb_next(&rsv->rsv_node);
-               rsv = list_entry(next,struct ext4_reserve_window_node,rsv_node);
+               rsv = rb_entry(next,struct ext4_reserve_window_node,rsv_node);
 
                /*
                 * Reached the last reservation, we can just append to the
@@ -1210,7 +1210,7 @@ static void try_to_extend_reservation(struct ext4_reserve_window_node *my_rsv,
        if (!next)
                my_rsv->rsv_end += size;
        else {
-               next_rsv = list_entry(next, struct ext4_reserve_window_node, rsv_node);
+               next_rsv = rb_entry(next, struct ext4_reserve_window_node, rsv_node);
 
                if ((next_rsv->rsv_start - my_rsv->rsv_end - 1) >= size)
                        my_rsv->rsv_end += size;