On Wed, Feb 24, 2021 at 07:50:12AM -0500, Sasha Levin wrote:
From: Nikolay Borisov nborisov@suse.com
[ Upstream commit 9db4dc241e87fccd8301357d5ef908f40b50f2e3 ]
It's currently u64 which gets instantly translated either to LONG_MAX (if U64_MAX is passed) or cast to an unsigned long (which is in fact, wrong because writeback_control::nr_to_write is a signed, long type).
Just convert the function's argument to be long time which obviates the need to manually convert u64 value to a long. Adjust all call sites which pass U64_MAX to pass LONG_MAX. Finally ensure that in shrink_delalloc the u64 is converted to a long without overflowing, resulting in a negative number.
This patch is a cleanup and I don't see any other patch depend on it, so please drop it from autosel.