percpu: build first chunk allocators selectively
There's no need to build unused first chunk allocators in. Define
CONFIG_NEED_PER_CPU_*_FIRST_CHUNK and let archs enable them
selectively.
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/mm/percpu.c b/mm/percpu.c
index 6feac79..7971997 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1414,8 +1414,9 @@
return pcpu_unit_size;
}
-static size_t pcpu_calc_fc_sizes(size_t static_size, size_t reserved_size,
- ssize_t *dyn_sizep)
+static inline size_t pcpu_calc_fc_sizes(size_t static_size,
+ size_t reserved_size,
+ ssize_t *dyn_sizep)
{
size_t size_sum;
@@ -1427,6 +1428,8 @@
return size_sum;
}
+#if defined(CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK) || \
+ !defined(CONFIG_HAVE_SETUP_PER_CPU_AREA)
/**
* pcpu_embed_first_chunk - embed the first percpu chunk into bootmem
* @static_size: the size of static percpu area in bytes
@@ -1495,7 +1498,10 @@
return pcpu_setup_first_chunk(static_size, reserved_size, dyn_size,
unit_size, base, NULL);
}
+#endif /* CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK ||
+ !CONFIG_HAVE_SETUP_PER_CPU_AREA */
+#ifdef CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK
/**
* pcpu_page_first_chunk - map the first chunk using PAGE_SIZE pages
* @static_size: the size of static percpu area in bytes
@@ -1598,12 +1604,9 @@
free_bootmem(__pa(pages), pages_size);
return ret;
}
+#endif /* CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK */
-/*
- * Large page remapping first chunk setup helper
- */
-#ifdef CONFIG_NEED_MULTIPLE_NODES
-
+#ifdef CONFIG_NEED_PER_CPU_LPAGE_FIRST_CHUNK
/**
* pcpu_lpage_build_unit_map - build unit_map for large page remapping
* @static_size: the size of static percpu area in bytes
@@ -1982,7 +1985,7 @@
return NULL;
}
-#endif
+#endif /* CONFIG_NEED_PER_CPU_LPAGE_FIRST_CHUNK */
/*
* Generic percpu area setup.