mm: cleanup: remove unused tsk arg from __access_remote_vm
Despite a comment that said that page fault accounting would be charged to
whatever task_struct* was passed into __access_remote_vm(), the tsk
argument was actually unused.
Making page fault accounting actually use this task struct is quite a
project, so there is no point in keeping the tsk argument.
Delete both the comment, and the argument.
[rppt@linux.ibm.com: changelog addition]
Link: https://lkml.kernel.org/r/20201026074137.4147787-1-jhubbard@nvidia.com
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/memory.c b/mm/memory.c
index 50632c4..4a42a74 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4885,11 +4885,10 @@ EXPORT_SYMBOL_GPL(generic_access_phys);
#endif
/*
- * Access another process' address space as given in mm. If non-NULL, use the
- * given task for page fault accounting.
+ * Access another process' address space as given in mm.
*/
-int __access_remote_vm(struct task_struct *tsk, struct mm_struct *mm,
- unsigned long addr, void *buf, int len, unsigned int gup_flags)
+int __access_remote_vm(struct mm_struct *mm, unsigned long addr, void *buf,
+ int len, unsigned int gup_flags)
{
struct vm_area_struct *vma;
void *old_buf = buf;
@@ -4966,7 +4965,7 @@ int __access_remote_vm(struct task_struct *tsk, struct mm_struct *mm,
int access_remote_vm(struct mm_struct *mm, unsigned long addr,
void *buf, int len, unsigned int gup_flags)
{
- return __access_remote_vm(NULL, mm, addr, buf, len, gup_flags);
+ return __access_remote_vm(mm, addr, buf, len, gup_flags);
}
/*
@@ -4984,7 +4983,7 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr,
if (!mm)
return 0;
- ret = __access_remote_vm(tsk, mm, addr, buf, len, gup_flags);
+ ret = __access_remote_vm(mm, addr, buf, len, gup_flags);
mmput(mm);