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mm: remove arch_bprm_mm_init() hook

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From: Dave Hansen <dave.hansen@linux.intel.com>

MPX is being removed from the kernel due to a lack of support
in the toolchain going forward (gcc).

arch_bprm_mm_init() is used at execve() time.  The only non-stub
implementation is on x86 for MPX.  Remove the hook entirely from
all architectures and generic code.

Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: x86@kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-arch@vger.kernel.org
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
This commit is contained in:
Dave Hansen
2020-01-23 10:41:16 -08:00
committed by Dave Hansen
parent aa9ccb7b47
commit 42222eae17
6 changed files with 0 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/powerpc/include/asm/mmu_context.h
View File

@ -238,11 +238,6 @@ static inline void arch_unmap(struct mm_struct *mm,
mm->context.vdso_base = 0; mm->context.vdso_base = 0;
} }
static inline void arch_bprm_mm_init(struct mm_struct *mm,
struct vm_area_struct *vma)
{
}
#ifdef CONFIG_PPC_MEM_KEYS #ifdef CONFIG_PPC_MEM_KEYS
bool arch_vma_access_permitted(struct vm_area_struct *vma, bool write, bool arch_vma_access_permitted(struct vm_area_struct *vma, bool write,
bool execute, bool foreign); bool execute, bool foreign);

5
arch/um/include/asm/mmu_context.h
View File

@ -25,11 +25,6 @@ static inline void arch_unmap(struct mm_struct *mm,
unsigned long start, unsigned long end) unsigned long start, unsigned long end)
{ {
} }
static inline void arch_bprm_mm_init(struct mm_struct *mm,
struct vm_area_struct *vma)
{
}
static inline bool arch_vma_access_permitted(struct vm_area_struct *vma, static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
bool write, bool execute, bool foreign) bool write, bool execute, bool foreign)
{ {

5
arch/unicore32/include/asm/mmu_context.h
View File

@ -89,11 +89,6 @@ static inline void arch_unmap(struct mm_struct *mm,
{ {
} }
static inline void arch_bprm_mm_init(struct mm_struct *mm,
struct vm_area_struct *vma)
{
}
static inline bool arch_vma_access_permitted(struct vm_area_struct *vma, static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
bool write, bool execute, bool foreign) bool write, bool execute, bool foreign)
{ {

6
arch/x86/include/asm/mmu_context.h
View File

@ -272,12 +272,6 @@ static inline bool is_64bit_mm(struct mm_struct *mm)
} }
#endif #endif
static inline void arch_bprm_mm_init(struct mm_struct *mm,
struct vm_area_struct *vma)
{
mpx_mm_init(mm);
}
static inline void arch_unmap(struct mm_struct *mm, unsigned long start, static inline void arch_unmap(struct mm_struct *mm, unsigned long start,
unsigned long end) unsigned long end)
{ {

1
fs/exec.c
View File

@ -273,7 +273,6 @@ static int __bprm_mm_init(struct linux_binprm *bprm)
goto err; goto err;
mm->stack_vm = mm->total_vm = 1; mm->stack_vm = mm->total_vm = 1;
arch_bprm_mm_init(mm, vma);
up_write(&mm->mmap_sem); up_write(&mm->mmap_sem);
bprm->p = vma->vm_end - sizeof(void *); bprm->p = vma->vm_end - sizeof(void *);
return 0; return 0;

5
include/asm-generic/mm_hooks.h
View File

@ -22,11 +22,6 @@ static inline void arch_unmap(struct mm_struct *mm,
{ {
} }
static inline void arch_bprm_mm_init(struct mm_struct *mm,
struct vm_area_struct *vma)
{
}
static inline bool arch_vma_access_permitted(struct vm_area_struct *vma, static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
bool write, bool execute, bool foreign) bool write, bool execute, bool foreign)
{ {