e8edc6e03a
First thing mm.h does is including sched.h solely for can_do_mlock() inline function which has "current" dereference inside. By dealing with can_do_mlock() mm.h can be detached from sched.h which is good. See below, why. This patch a) removes unconditional inclusion of sched.h from mm.h b) makes can_do_mlock() normal function in mm/mlock.c c) exports can_do_mlock() to not break compilation d) adds sched.h inclusions back to files that were getting it indirectly. e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were getting them indirectly Net result is: a) mm.h users would get less code to open, read, preprocess, parse, ... if they don't need sched.h b) sched.h stops being dependency for significant number of files: on x86_64 allmodconfig touching sched.h results in recompile of 4083 files, after patch it's only 3744 (-8.3%). Cross-compile tested on all arm defconfigs, all mips defconfigs, all powerpc defconfigs, alpha alpha-up arm i386 i386-up i386-defconfig i386-allnoconfig ia64 ia64-up m68k mips parisc parisc-up powerpc powerpc-up s390 s390-up sparc sparc-up sparc64 sparc64-up um-x86_64 x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig as well as my two usual configs. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
144 lines
4 KiB
C
144 lines
4 KiB
C
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
|
|
*
|
|
* This copyrighted material is made available to anyone wishing to use,
|
|
* modify, copy, or redistribute it subject to the terms and conditions
|
|
* of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef __GLOCK_DOT_H__
|
|
#define __GLOCK_DOT_H__
|
|
|
|
#include <linux/sched.h>
|
|
#include "incore.h"
|
|
|
|
/* Flags for lock requests; used in gfs2_holder gh_flag field.
|
|
From lm_interface.h:
|
|
#define LM_FLAG_TRY 0x00000001
|
|
#define LM_FLAG_TRY_1CB 0x00000002
|
|
#define LM_FLAG_NOEXP 0x00000004
|
|
#define LM_FLAG_ANY 0x00000008
|
|
#define LM_FLAG_PRIORITY 0x00000010 */
|
|
|
|
#define GL_ASYNC 0x00000040
|
|
#define GL_EXACT 0x00000080
|
|
#define GL_SKIP 0x00000100
|
|
#define GL_ATIME 0x00000200
|
|
#define GL_NOCACHE 0x00000400
|
|
#define GL_NOCANCEL 0x00001000
|
|
|
|
#define GLR_TRYFAILED 13
|
|
#define GLR_CANCELED 14
|
|
|
|
static inline int gfs2_glock_is_locked_by_me(struct gfs2_glock *gl)
|
|
{
|
|
struct gfs2_holder *gh;
|
|
int locked = 0;
|
|
|
|
/* Look in glock's list of holders for one with current task as owner */
|
|
spin_lock(&gl->gl_spin);
|
|
list_for_each_entry(gh, &gl->gl_holders, gh_list) {
|
|
if (gh->gh_owner_pid == current->pid) {
|
|
locked = 1;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock(&gl->gl_spin);
|
|
|
|
return locked;
|
|
}
|
|
|
|
static inline int gfs2_glock_is_held_excl(struct gfs2_glock *gl)
|
|
{
|
|
return gl->gl_state == LM_ST_EXCLUSIVE;
|
|
}
|
|
|
|
static inline int gfs2_glock_is_held_dfrd(struct gfs2_glock *gl)
|
|
{
|
|
return gl->gl_state == LM_ST_DEFERRED;
|
|
}
|
|
|
|
static inline int gfs2_glock_is_held_shrd(struct gfs2_glock *gl)
|
|
{
|
|
return gl->gl_state == LM_ST_SHARED;
|
|
}
|
|
|
|
static inline int gfs2_glock_is_blocking(struct gfs2_glock *gl)
|
|
{
|
|
int ret;
|
|
spin_lock(&gl->gl_spin);
|
|
ret = test_bit(GLF_DEMOTE, &gl->gl_flags) || !list_empty(&gl->gl_waiters3);
|
|
spin_unlock(&gl->gl_spin);
|
|
return ret;
|
|
}
|
|
|
|
int gfs2_glock_get(struct gfs2_sbd *sdp,
|
|
u64 number, const struct gfs2_glock_operations *glops,
|
|
int create, struct gfs2_glock **glp);
|
|
void gfs2_glock_hold(struct gfs2_glock *gl);
|
|
int gfs2_glock_put(struct gfs2_glock *gl);
|
|
void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state, unsigned flags,
|
|
struct gfs2_holder *gh);
|
|
void gfs2_holder_reinit(unsigned int state, unsigned flags,
|
|
struct gfs2_holder *gh);
|
|
void gfs2_holder_uninit(struct gfs2_holder *gh);
|
|
int gfs2_glock_nq(struct gfs2_holder *gh);
|
|
int gfs2_glock_poll(struct gfs2_holder *gh);
|
|
int gfs2_glock_wait(struct gfs2_holder *gh);
|
|
void gfs2_glock_dq(struct gfs2_holder *gh);
|
|
|
|
void gfs2_glock_dq_uninit(struct gfs2_holder *gh);
|
|
int gfs2_glock_nq_num(struct gfs2_sbd *sdp,
|
|
u64 number, const struct gfs2_glock_operations *glops,
|
|
unsigned int state, int flags, struct gfs2_holder *gh);
|
|
|
|
int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs);
|
|
void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs);
|
|
void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs);
|
|
|
|
/**
|
|
* gfs2_glock_nq_init - intialize a holder and enqueue it on a glock
|
|
* @gl: the glock
|
|
* @state: the state we're requesting
|
|
* @flags: the modifier flags
|
|
* @gh: the holder structure
|
|
*
|
|
* Returns: 0, GLR_*, or errno
|
|
*/
|
|
|
|
static inline int gfs2_glock_nq_init(struct gfs2_glock *gl,
|
|
unsigned int state, int flags,
|
|
struct gfs2_holder *gh)
|
|
{
|
|
int error;
|
|
|
|
gfs2_holder_init(gl, state, flags, gh);
|
|
|
|
error = gfs2_glock_nq(gh);
|
|
if (error)
|
|
gfs2_holder_uninit(gh);
|
|
|
|
return error;
|
|
}
|
|
|
|
/* Lock Value Block functions */
|
|
|
|
int gfs2_lvb_hold(struct gfs2_glock *gl);
|
|
void gfs2_lvb_unhold(struct gfs2_glock *gl);
|
|
|
|
void gfs2_glock_cb(void *cb_data, unsigned int type, void *data);
|
|
|
|
void gfs2_glock_schedule_for_reclaim(struct gfs2_glock *gl);
|
|
void gfs2_reclaim_glock(struct gfs2_sbd *sdp);
|
|
|
|
void gfs2_scand_internal(struct gfs2_sbd *sdp);
|
|
void gfs2_gl_hash_clear(struct gfs2_sbd *sdp, int wait);
|
|
|
|
int __init gfs2_glock_init(void);
|
|
int gfs2_create_debugfs_file(struct gfs2_sbd *sdp);
|
|
void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp);
|
|
int gfs2_register_debugfs(void);
|
|
void gfs2_unregister_debugfs(void);
|
|
|
|
#endif /* __GLOCK_DOT_H__ */
|