percpu: remove has_reserved from pcpu_chunk

Prior this variable was used to manage statistics when the first chunk
had a reserved region. The previous patch introduced start_offset to
keep track of the offset by value rather than boolean. Therefore,
has_reserved can be removed.

Signed-off-by: Dennis Zhou <dennisszhou@gmail.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/mm/percpu-internal.h b/mm/percpu-internal.h
index 92fc012..c876b5b 100644 (file)
--- a/mm/percpu-internal.h
+++ b/mm/percpu-internal.h
@@ -23,11 +23,6 @@ struct pcpu_chunk {
        void                    *data;          /* chunk data */
        int                     first_free;     /* no free below this */
        bool                    immutable;      /* no [de]population allowed */
-       bool                    has_reserved;   /* Indicates if chunk has reserved space
-                                                  at the beginning. Reserved chunk will
-                                                  contain reservation for static chunk.
-                                                  Dynamic chunk will contain reservation
-                                                  for static and reserved chunks. */
        int                     start_offset;   /* the overlap with the previous
                                                   region to have a page aligned
                                                   base_addr */

diff --git a/mm/percpu-stats.c b/mm/percpu-stats.c
index 44e561d..32f3550 100644 (file)
--- a/mm/percpu-stats.c
+++ b/mm/percpu-stats.c
@@ -58,7 +58,7 @@ static void chunk_map_stats(struct seq_file *m, struct pcpu_chunk *chunk,
        int cur_min_alloc = 0, cur_med_alloc = 0, cur_max_alloc = 0;
 
        alloc_sizes = buffer;
-       s_index = chunk->has_reserved ? 1 : 0;
+       s_index = (chunk->start_offset) ? 1 : 0;
 
        /* find last allocation */
        last_alloc = -1;

diff --git a/mm/percpu.c b/mm/percpu.c
index e94f0d1..470e1a0 100644 (file)
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -727,7 +727,6 @@ static struct pcpu_chunk *pcpu_alloc_chunk(void)
        chunk->map[0] = 0;
        chunk->map[1] = pcpu_unit_size | 1;
        chunk->map_used = 1;
-       chunk->has_reserved = false;
 
        INIT_LIST_HEAD(&chunk->list);
        INIT_LIST_HEAD(&chunk->map_extend_list);
@@ -1704,7 +1703,6 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
        schunk->map[1] = schunk->start_offset;
        schunk->map[2] = (ai->static_size + schunk->free_size) | 1;
        schunk->map_used = 2;
-       schunk->has_reserved = true;
 
        /* init dynamic chunk if necessary */
        if (dyn_size) {
@@ -1724,7 +1722,6 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
                dchunk->map[1] = dchunk->start_offset;
                dchunk->map[2] = (dchunk->start_offset + dchunk->free_size) | 1;
                dchunk->map_used = 2;
-               dchunk->has_reserved = true;
        }
 
        /* link the first chunk in */