erofs: mark z_erofs_lzma_init/erofs_pcpubuf_init w/ __init

They are used during the erofs module init phase. Let's mark it as
__init like any other function.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Yue Hu <huyue2@coolpad.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20230303063731.66760-1-frank.li@vivo.comSigned-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

fs/erofs/decompressor_lzma.c

@@ -47,7 +47,7 @@ void z_erofs_lzma_exit(void)
 	}
 }
 
-int z_erofs_lzma_init(void)
+int __init z_erofs_lzma_init(void)
 {
 	unsigned int i;
 

fs/erofs/internal.h

@@ -486,7 +486,7 @@ static inline void *erofs_vm_map_ram(struct page **pages, unsigned int count)
 void *erofs_get_pcpubuf(unsigned int requiredpages);
 void erofs_put_pcpubuf(void *ptr);
 int erofs_pcpubuf_growsize(unsigned int nrpages);
-void erofs_pcpubuf_init(void);
+void __init erofs_pcpubuf_init(void);
 void erofs_pcpubuf_exit(void);
 
 int erofs_register_sysfs(struct super_block *sb);
@@ -545,7 +545,7 @@ static inline int z_erofs_fill_inode(struct inode *inode) { return -EOPNOTSUPP;
 #endif	/* !CONFIG_EROFS_FS_ZIP */
 
 #ifdef CONFIG_EROFS_FS_ZIP_LZMA
-int z_erofs_lzma_init(void);
+int __init z_erofs_lzma_init(void);
 void z_erofs_lzma_exit(void);
 int z_erofs_load_lzma_config(struct super_block *sb,
 			     struct erofs_super_block *dsb,

fs/erofs/pcpubuf.c

@@ -114,7 +114,7 @@ int erofs_pcpubuf_growsize(unsigned int nrpages)
 	return ret;
 }
 
-void erofs_pcpubuf_init(void)
+void __init erofs_pcpubuf_init(void)
 {
 	int cpu;