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>
106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
#ifndef _X8664_TLBFLUSH_H
|
|
#define _X8664_TLBFLUSH_H
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/sched.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/system.h>
|
|
|
|
static inline void __flush_tlb(void)
|
|
{
|
|
write_cr3(read_cr3());
|
|
}
|
|
|
|
static inline void __flush_tlb_all(void)
|
|
{
|
|
unsigned long cr4 = read_cr4();
|
|
write_cr4(cr4 & ~X86_CR4_PGE); /* clear PGE */
|
|
write_cr4(cr4); /* write old PGE again and flush TLBs */
|
|
}
|
|
|
|
#define __flush_tlb_one(addr) \
|
|
__asm__ __volatile__("invlpg (%0)" :: "r" (addr) : "memory")
|
|
|
|
|
|
/*
|
|
* TLB flushing:
|
|
*
|
|
* - flush_tlb() flushes the current mm struct TLBs
|
|
* - flush_tlb_all() flushes all processes TLBs
|
|
* - flush_tlb_mm(mm) flushes the specified mm context TLB's
|
|
* - flush_tlb_page(vma, vmaddr) flushes one page
|
|
* - flush_tlb_range(vma, start, end) flushes a range of pages
|
|
* - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
|
|
* - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
|
|
*
|
|
* x86-64 can only flush individual pages or full VMs. For a range flush
|
|
* we always do the full VM. Might be worth trying if for a small
|
|
* range a few INVLPGs in a row are a win.
|
|
*/
|
|
|
|
#ifndef CONFIG_SMP
|
|
|
|
#define flush_tlb() __flush_tlb()
|
|
#define flush_tlb_all() __flush_tlb_all()
|
|
#define local_flush_tlb() __flush_tlb()
|
|
|
|
static inline void flush_tlb_mm(struct mm_struct *mm)
|
|
{
|
|
if (mm == current->active_mm)
|
|
__flush_tlb();
|
|
}
|
|
|
|
static inline void flush_tlb_page(struct vm_area_struct *vma,
|
|
unsigned long addr)
|
|
{
|
|
if (vma->vm_mm == current->active_mm)
|
|
__flush_tlb_one(addr);
|
|
}
|
|
|
|
static inline void flush_tlb_range(struct vm_area_struct *vma,
|
|
unsigned long start, unsigned long end)
|
|
{
|
|
if (vma->vm_mm == current->active_mm)
|
|
__flush_tlb();
|
|
}
|
|
|
|
#else
|
|
|
|
#include <asm/smp.h>
|
|
|
|
#define local_flush_tlb() \
|
|
__flush_tlb()
|
|
|
|
extern void flush_tlb_all(void);
|
|
extern void flush_tlb_current_task(void);
|
|
extern void flush_tlb_mm(struct mm_struct *);
|
|
extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
|
|
|
|
#define flush_tlb() flush_tlb_current_task()
|
|
|
|
static inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long start, unsigned long end)
|
|
{
|
|
flush_tlb_mm(vma->vm_mm);
|
|
}
|
|
|
|
#define TLBSTATE_OK 1
|
|
#define TLBSTATE_LAZY 2
|
|
|
|
/* Roughly an IPI every 20MB with 4k pages for freeing page table
|
|
ranges. Cost is about 42k of memory for each CPU. */
|
|
#define ARCH_FREE_PTE_NR 5350
|
|
|
|
#endif
|
|
|
|
#define flush_tlb_kernel_range(start, end) flush_tlb_all()
|
|
|
|
static inline void flush_tlb_pgtables(struct mm_struct *mm,
|
|
unsigned long start, unsigned long end)
|
|
{
|
|
/* x86_64 does not keep any page table caches in a software TLB.
|
|
The CPUs do in their hardware TLBs, but they are handled
|
|
by the normal TLB flushing algorithms. */
|
|
}
|
|
|
|
#endif /* _X8664_TLBFLUSH_H */
|