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arm64: Change elfcore for_each_mte_vma() to use VMA iterator

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Rework for_each_mte_vma() to use a VMA iterator instead of an explicit
linked-list. This will allow easy integration with the maple tree work
which removes the VMA list altogether.

Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20220218023650.672072-1-Liam.Howlett@oracle.com
[will: Folded in fix from Catalin]
Link: https://lore.kernel.org/r/YhUcywqIhmHvX6dG@arm.com
Signed-off--by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Liam Howlett 2022-02-18 02:37:04 +00:00 • committed by Will Deacon
parent 731451ab3c
commit 3a4f7ef4be
1 changed files with 17 additions and 6 deletions
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23
arch/arm64/kernel/elfcore.c
View file

@ -8,9 +8,16 @@
#include <asm/cpufeature.h>
#include <asm/mte.h>
#define for_each_mte_vma(tsk, vma) \
#ifndef VMA_ITERATOR
#define VMA_ITERATOR(name, mm, addr) \
struct mm_struct *name = mm
#define for_each_vma(vmi, vma) \
for (vma = vmi->mmap; vma; vma = vma->vm_next)
#endif
#define for_each_mte_vma(vmi, vma) \
if (system_supports_mte()) \
for (vma = tsk->mm->mmap; vma; vma = vma->vm_next) \
for_each_vma(vmi, vma) \
if (vma->vm_flags & VM_MTE)
static unsigned long mte_vma_tag_dump_size(struct vm_area_struct *vma)
@ -65,8 +72,9 @@ Elf_Half elf_core_extra_phdrs(void)
{
struct vm_area_struct *vma;
int vma_count = 0;
VMA_ITERATOR(vmi, current->mm, 0);
for_each_mte_vma(current, vma)
for_each_mte_vma(vmi, vma)
vma_count++;
return vma_count;
@ -75,8 +83,9 @@ Elf_Half elf_core_extra_phdrs(void)
int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
{
struct vm_area_struct *vma;
VMA_ITERATOR(vmi, current->mm, 0);
for_each_mte_vma(current, vma) {
for_each_mte_vma(vmi, vma) {
struct elf_phdr phdr;
phdr.p_type = PT_ARM_MEMTAG_MTE;
@ -100,8 +109,9 @@ size_t elf_core_extra_data_size(void)
{
struct vm_area_struct *vma;
size_t data_size = 0;
VMA_ITERATOR(vmi, current->mm, 0);
for_each_mte_vma(current, vma)
for_each_mte_vma(vmi, vma)
data_size += mte_vma_tag_dump_size(vma);
return data_size;
@ -110,8 +120,9 @@ size_t elf_core_extra_data_size(void)
int elf_core_write_extra_data(struct coredump_params *cprm)
{
struct vm_area_struct *vma;
VMA_ITERATOR(vmi, current->mm, 0);
for_each_mte_vma(current, vma) {
for_each_mte_vma(vmi, vma) {
if (vma->vm_flags & VM_DONTDUMP)
continue;