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Commit c61c7038 authored by Al Viro's avatar Al Viro
Browse files

untangling process_vm_..., part 2 



move iov to caller's stack frame; the value we assign to it on the
next call of process_vm_rw_pages() is equal to the value it had
when the last time we were leaving process_vm_rw_pages().

drop lvec argument of process_vm_rw_pages() - it's not used anymore.

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 480402e1

mm/process_vm_access.c

+5 −3
Original line number Diff line number Diff line
@@ -45,7 +45,7 @@ static int process_vm_rw_pages(struct task_struct *task, 
			       unsigned long pa,

			       unsigned long start_offset,

			       unsigned long len,

			       const struct iovec *lvec,

			       const struct iovec **iovp,

			       unsigned long lvec_cnt,

			       unsigned long *lvec_current,

			       size_t *lvec_offset,
@@ -60,7 +60,7 @@ static int process_vm_rw_pages(struct task_struct *task, 
	int ret;

	ssize_t bytes_to_copy;

	ssize_t rc = 0;

	const struct iovec *iov = lvec + *lvec_current;

	const struct iovec *iov = *iovp;



	*bytes_copied = 0;
@@ -149,6 +149,7 @@ end: 
			put_page(process_pages[j]);

	}



	*iovp = iov;

	return rc;

}
@@ -192,6 +193,7 @@ static int process_vm_rw_single_vec(unsigned long addr, 
	unsigned long nr_pages_to_copy;

	unsigned long max_pages_per_loop = PVM_MAX_KMALLOC_PAGES

		/ sizeof(struct pages *);

	const struct iovec *iov = lvec + *lvec_current;



	*bytes_copied = 0;
@@ -206,7 +208,7 @@ static int process_vm_rw_single_vec(unsigned long addr, 


		rc = process_vm_rw_pages(task, mm, process_pages, pa,

					 start_offset, len,

					 lvec, lvec_cnt,

					 &iov, lvec_cnt,

					 lvec_current, lvec_offset,

					 vm_write, nr_pages_to_copy,

					 &bytes_copied_loop);