Move list types from <linux/list.h> to <linux/types.h>. (de5d9bf6) · Commits · 戴 / test

This allows a list_head (or hlist_head, etc.) to be used from places that used to be impractical, in particular <asm/processor.h>, which used to cause include file recursion: <linux/list.h> includes <linux/prefetch.h>, which always includes <asm/processor.h> for the prefetch macros, as well as <asm/system.h>, which often includes <asm/processor.h> directly or indirectly. This avoids a lot of painful workaround hackery on the tile architecture, where we use a list_head in the thread_struct to chain together tasks that are activated on a particular hardwall. Signed-off-by:

Chris Metcalf <cmetcalf@tilera.com> Reviewed-by:

Matthew Wilcox <willy@linux.intel.com>

include/linux/list.h

+1 −12

Original line number	Diff line number	Diff line
		#ifndef _LINUX_LIST_H
		#define _LINUX_LIST_H

		#include <linux/types.h>
		#include <linux/stddef.h>
		#include <linux/poison.h>
		#include <linux/prefetch.h>
		@@ -16,10 +17,6 @@
		* using the generic single-entry routines.
		*/

		struct list_head {
		struct list_head next, prev;
		};

		#define LIST_HEAD_INIT(name) { &(name), &(name) }

		#define LIST_HEAD(name) \
		@@ -551,14 +548,6 @@ static inline void list_splice_tail_init(struct list_head *list,
		* You lose the ability to access the tail in O(1).
		*/

		struct hlist_head {
		struct hlist_node *first;
		};

		struct hlist_node {
		struct hlist_node next, *pprev;
		};

		#define HLIST_HEAD_INIT { .first = NULL }
		#define HLIST_HEAD(name) struct hlist_head name = { .first = NULL }
		#define INIT_HLIST_HEAD(ptr) ((ptr)->first = NULL)

include/linux/types.h

+12 −0

Original line number	Diff line number	Diff line
		@@ -197,6 +197,18 @@ typedef struct {
		} atomic64_t;
		#endif

		struct list_head {
		struct list_head next, prev;
		};

		struct hlist_head {
		struct hlist_node *first;
		};

		struct hlist_node {
		struct hlist_node next, *pprev;
		};

		struct ustat {
		__kernel_daddr_t f_tfree;
		__kernel_ino_t f_tinode;

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