mm/shuffle: fix section mismatch warning

clang sometimes decides not to inline shuffle_zone(), but it calls a
__meminit function. Without the extra __meminit annotation we get this
warning:

WARNING: modpost: vmlinux.o(.text+0x2a86d4): Section mismatch in reference from the function shuffle_zone() to the function .meminit.text:__shuffle_zone()
The function shuffle_zone() references
the function __meminit __shuffle_zone().
This is often because shuffle_zone lacks a __meminit
annotation or the annotation of __shuffle_zone is wrong.

shuffle_free_memory() did not show the same problem in my tests, but it
could happen in theory as well, so mark both as __meminit.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Arnd Bergmann <[e-mail]>
Reviewed-by: David Hildenbrand <[e-mail]>
Reviewed-by: Nathan Chancellor <[e-mail]>
Cc: Nick Desaulniers <[e-mail]>
Cc: Arnd Bergmann <[e-mail]>
Cc: Wei Yang <[e-mail]>
Cc: Dan Williams <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

mm/shuffle.h

···
 DECLARE_STATIC_KEY_FALSE(page_alloc_shuffle_key);
 extern void __shuffle_free_memory(pg_data_t *pgdat);
 extern bool shuffle_pick_tail(void);
-static inline void shuffle_free_memory(pg_data_t *pgdat)
+static inline void __meminit shuffle_free_memory(pg_data_t *pgdat)
 {
 	if (!static_branch_unlikely(&page_alloc_shuffle_key))
 		return;
···
 }
 
 extern void __shuffle_zone(struct zone *z);
-static inline void shuffle_zone(struct zone *z)
+static inline void __meminit shuffle_zone(struct zone *z)
 {
 	if (!static_branch_unlikely(&page_alloc_shuffle_key))
 		return;