include/linux/mm_types.h: ifdef struct vm_area_struct::swap_readahead_info (219f8a2e) · Commits · 戴 / test

The field is only used in swap code. Link: http://lkml.kernel.org/r/20190503190500.GA30589@avx2 Signed-off-by:

include/linux/mm_types.h

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -329,7 +329,9 @@ struct vm_area_struct {
	struct file * vm_file; /* File we map to (can be NULL). */		struct file * vm_file; /* File we map to (can be NULL). */
	void * vm_private_data; /* was vm_pte (shared mem) */		void * vm_private_data; /* was vm_pte (shared mem) */

			#ifdef CONFIG_SWAP
	atomic_long_t swap_readahead_info;		atomic_long_t swap_readahead_info;
			#endif
	#ifndef CONFIG_MMU		#ifndef CONFIG_MMU
	struct vm_region vm_region; / NOMMU mapping region */		struct vm_region vm_region; / NOMMU mapping region */
	#endif		#endif