The current implementation would introduce variable shadowing due to
both max() and min() are using the same __x and __y.
This may not be a big deal, but since kernel is already handling it
properly using __UNIQUE_ID() macro, and has more checks, we can
cross-port the kernel version to btrfs-progs.
There are some dependency needed, they are all small enough thus can be
put into the helper.
- __PASTE()
- __UNIQUE_ID()
- BUILD_BUG_ON_ZERO()
- __is_constexpr()
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We won't actually use the async code in progs, however we call the
helpers and such all over the normal code, so sync this into btrfs-progs
to make syncing other parts of the kernel easier.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
