kexec: delete a useless check in crash_shrink_memory()

The check '(crashk_res.parent != NULL)' is added by commit e05bd3367bd3
("kexec: fix Oops in crash_shrink_memory()"), but it's stale now.  Because
if 'crashk_res' is not reserved, it will be zero in size and will be
intercepted by the above 'if (new_size >= old_size)'.

Ago:
	if (new_size >= end - start + 1)

Now:
	old_size = (end == 0) ? 0 : end - start + 1;
	if (new_size >= old_size)

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Zhen Lei <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Cong Wang <[email protected]>
Cc: Eric W. Biederman <[email protected]>
Cc: Michael Holzheu <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions