A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 11:41:38 -04:00
Code Issues Projects Releases Packages Wiki Activity

mm: Make arch_unmap()/bprm_mm_init() available to all architectures

Browse source 
The x86 MPX patch set calls arch_unmap() and arch_bprm_mm_init()
from fs/exec.c, so we need at least a stub for them in all
architectures.  They are only called under an #ifdef for
CONFIG_MMU=y, so we can at least restict this to architectures
with MMU support.

blackfin/c6x have no MMU support, so do not call arch_unmap().
They also do not include mm_hooks.h or mmu_context.h at all and
do not need to be touched.

s390, um and unicore32 do not use asm-generic/mm_hooks.h, so got
their own arch_unmap() versions.  (I also moved um's
arch_dup_mmap() to be closer to the other mm_hooks.h functions).

xtensa only includes mm_hooks when MMU=y, which should be fine
since arch_unmap() is called only from MMU=y code.

For the rest, we use the stub copies of these functions in
asm-generic/mm_hook.h.

I cross compiled defconfigs for cris (to check NOMMU) and s390
to make sure that this works.  I also checked a 64-bit build
of UML and all my normal x86 builds including PARAVIRT on and
off.

Signed-off-by: Dave Hansen <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
This commit is contained in:
Dave Hansen 2014-11-18 10:23:50 -08:00 • committed by Thomas Gleixner
commit 62e88b1c00
5 changed files with 55 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

24
arch/um/include/asm/mmu_context.h
View file

@ -10,7 +10,26 @@
#include <asm/mmu.h>
extern void uml_setup_stubs(struct mm_struct *mm);
/*
* Needed since we do not use the asm-generic/mm_hooks.h:
*/
static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
{
uml_setup_stubs(mm);
}
extern void arch_exit_mmap(struct mm_struct *mm);
static inline void arch_unmap(struct mm_struct *mm,
struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
}
static inline void arch_bprm_mm_init(struct mm_struct *mm,
struct vm_area_struct *vma)
{
}
/*
* end asm-generic/mm_hooks.h functions
*/
#define deactivate_mm(tsk,mm) do { } while (0)
@ -41,11 +60,6 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
}
}
static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
{
uml_setup_stubs(mm);
}
static inline void enter_lazy_tlb(struct mm_struct *mm,
struct task_struct *tsk)
{