percpu: make @dyn_size always mean min dyn_size in first chunk init functions

In pcpu_build_alloc_info() and pcpu_embed_first_chunk(), @dyn_size was
ssize_t, -1 meant auto-size, 0 forced 0 and positive meant minimum
size.  There's no use case for forcing 0 and the upcoming early alloc
support always requires non-zero dynamic size.  Make @dyn_size always
mean minimum dyn_size.

While at it, make pcpu_build_alloc_info() static which doesn't have
any external caller as suggested by David Rientjes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: David Rientjes <rientjes@google.com>

1 files changed, 1 insertions, 6 deletions

diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index d3a38d687104..3ffd05e550de 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -104,16 +104,11 @@ extern struct pcpu_alloc_info * __init pcpu_alloc_alloc_info(int nr_groups,
                                                              int nr_units);
 extern void __init pcpu_free_alloc_info(struct pcpu_alloc_info *ai);
 
-extern struct pcpu_alloc_info * __init pcpu_build_alloc_info(
-                                size_t reserved_size, ssize_t dyn_size,
-                                size_t atom_size,
-                                pcpu_fc_cpu_distance_fn_t cpu_distance_fn);
-
 extern int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
                                          void *base_addr);
 
 #ifdef CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK
-extern int __init pcpu_embed_first_chunk(size_t reserved_size, ssize_t dyn_size,
+extern int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
                                 size_t atom_size,
                                 pcpu_fc_cpu_distance_fn_t cpu_distance_fn,
                                 pcpu_fc_alloc_fn_t alloc_fn,