From: Davidlohr Bueso <dave@xxxxxxxxxxxx>
This becomes quite straightforward with the mmrange in place.
Signed-off-by: Davidlohr Bueso <dbueso@xxxxxxx>
---
arch/hexagon/kernel/vdso.c | 5 +++--
arch/hexagon/mm/vm_fault.c | 8 ++++----
2 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/arch/hexagon/kernel/vdso.c b/arch/hexagon/kernel/vdso.c
index 3ea968415539..53e3db1b54f1 100644
--- a/arch/hexagon/kernel/vdso.c
+++ b/arch/hexagon/kernel/vdso.c
@@ -64,8 +64,9 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
int ret;
unsigned long vdso_base;
struct mm_struct *mm = current->mm;
+ DEFINE_RANGE_LOCK_FULL(mmrange);
- if (down_write_killable(&mm->mmap_sem))
+ if (mm_write_lock_killable(mm, &mmrange))
return -EINTR;
/* Try to get it loaded right near ld.so/glibc. */
@@ -89,7 +90,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
mm->context.vdso = (void *)vdso_base;
up_fail:
- up_write(&mm->mmap_sem);
+ mm_write_unlock(mm, &mmrange);
return ret;
}
diff --git a/arch/hexagon/mm/vm_fault.c b/arch/hexagon/mm/vm_fault.c
index 7d6ada2c2230..58203949486e 100644
--- a/arch/hexagon/mm/vm_fault.c
+++ b/arch/hexagon/mm/vm_fault.c
@@ -69,7 +69,7 @@ void do_page_fault(unsigned long address, long cause, struct pt_regs *regs)
if (user_mode(regs))
flags |= FAULT_FLAG_USER;
retry:
- down_read(&mm->mmap_sem);
+ mm_read_lock(mm, &mmrange);
vma = find_vma(mm, address);
if (!vma)
goto bad_area;
@@ -122,11 +122,11 @@ void do_page_fault(unsigned long address, long cause, struct pt_regs *regs)
}
}
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm, &mmrange);
return;
}
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm, &mmrange);
/* Handle copyin/out exception cases */
if (!user_mode(regs))
@@ -155,7 +155,7 @@ void do_page_fault(unsigned long address, long cause, struct pt_regs *regs)
return;
bad_area:
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm, &mmrange);
if (user_mode(regs)) {
info.si_signo = SIGSEGV;
--
2.13.6
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