diff options
| author | Alexey Dobriyan <adobriyan@gmail.com> | 2007-05-21 01:22:52 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-21 09:18:19 -0700 |
| commit | e8edc6e03a5c8562dc70a6d969f732bdb355a7e7 (patch) | |
| tree | fc86c863655128a7041dfe613d14393d761fa7b9 /mm | |
| parent | ff1be9ad61e3e17ba83702d8ed0b534e5b8ee15c (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 'mm')
| -rw-r--r-- | mm/filemap_xip.c | 1 | ||||
| -rw-r--r-- | mm/madvise.c | 1 | ||||
| -rw-r--r-- | mm/mlock.c | 11 | ||||
| -rw-r--r-- | mm/msync.c | 1 | ||||
| -rw-r--r-- | mm/vmstat.c | 1 |
5 files changed, 15 insertions, 0 deletions
diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c index 1b49dab9b25..fa360e566d8 100644 --- a/mm/filemap_xip.c +++ b/mm/filemap_xip.c @@ -13,6 +13,7 @@ #include <linux/module.h> #include <linux/uio.h> #include <linux/rmap.h> +#include <linux/sched.h> #include <asm/tlbflush.h> #include "filemap.h" diff --git a/mm/madvise.c b/mm/madvise.c index e75096b5a6d..60542d006ec 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -10,6 +10,7 @@ #include <linux/syscalls.h> #include <linux/mempolicy.h> #include <linux/hugetlb.h> +#include <linux/sched.h> /* * Any behaviour which results in changes to the vma->vm_flags needs to diff --git a/mm/mlock.c b/mm/mlock.c index 3446b7ef731..4d3fea267e0 100644 --- a/mm/mlock.c +++ b/mm/mlock.c @@ -10,7 +10,18 @@ #include <linux/mm.h> #include <linux/mempolicy.h> #include <linux/syscalls.h> +#include <linux/sched.h> +#include <linux/module.h> +int can_do_mlock(void) +{ + if (capable(CAP_IPC_LOCK)) + return 1; + if (current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur != 0) + return 1; + return 0; +} +EXPORT_SYMBOL(can_do_mlock); static int mlock_fixup(struct vm_area_struct *vma, struct vm_area_struct **prev, unsigned long start, unsigned long end, unsigned int newflags) diff --git a/mm/msync.c b/mm/msync.c index 358d73cf7b7..144a7570535 100644 --- a/mm/msync.c +++ b/mm/msync.c @@ -12,6 +12,7 @@ #include <linux/mman.h> #include <linux/file.h> #include <linux/syscalls.h> +#include <linux/sched.h> /* * MS_SYNC syncs the entire file - including mappings. diff --git a/mm/vmstat.c b/mm/vmstat.c index 8faf27e5aa9..38254297a49 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -12,6 +12,7 @@ #include <linux/mm.h> #include <linux/module.h> #include <linux/cpu.h> +#include <linux/sched.h> #ifdef CONFIG_VM_EVENT_COUNTERS DEFINE_PER_CPU(struct vm_event_state, vm_event_states) = {{0}}; |