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authorAlexey Dobriyan <adobriyan@gmail.com>2007-05-20 17:22:52 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-21 12:18:19 -0400
commite8edc6e03a5c8562dc70a6d969f732bdb355a7e7 (patch)
treefc86c863655128a7041dfe613d14393d761fa7b9 /include/linux/mm.h
parentff1be9ad61e3e17ba83702d8ed0b534e5b8ee15c (diff)
Detach sched.h from mm.h
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>
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r--include/linux/mm.h11
1 files changed, 2 insertions, 9 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 4670ebd1f622..e4183c6c7de3 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1,7 +1,6 @@
1#ifndef _LINUX_MM_H 1#ifndef _LINUX_MM_H
2#define _LINUX_MM_H 2#define _LINUX_MM_H
3 3
4#include <linux/sched.h>
5#include <linux/errno.h> 4#include <linux/errno.h>
6#include <linux/capability.h> 5#include <linux/capability.h>
7 6
@@ -20,6 +19,7 @@
20 19
21struct mempolicy; 20struct mempolicy;
22struct anon_vma; 21struct anon_vma;
22struct user_struct;
23 23
24#ifndef CONFIG_DISCONTIGMEM /* Don't use mapnrs, do it properly */ 24#ifndef CONFIG_DISCONTIGMEM /* Don't use mapnrs, do it properly */
25extern unsigned long max_mapnr; 25extern unsigned long max_mapnr;
@@ -717,14 +717,7 @@ extern unsigned long shmem_get_unmapped_area(struct file *file,
717 unsigned long flags); 717 unsigned long flags);
718#endif 718#endif
719 719
720static inline int can_do_mlock(void) 720extern int can_do_mlock(void);
721{
722 if (capable(CAP_IPC_LOCK))
723 return 1;
724 if (current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur != 0)
725 return 1;
726 return 0;
727}
728extern int user_shm_lock(size_t, struct user_struct *); 721extern int user_shm_lock(size_t, struct user_struct *);
729extern void user_shm_unlock(size_t, struct user_struct *); 722extern void user_shm_unlock(size_t, struct user_struct *);
730 723