From d4b4baf312ff083fb1e85de92167ea3e968c684c Mon Sep 17 00:00:00 2001
From: David Sterba <dsterba@suse.com>
Date: Wed, 12 May 2021 13:09:21 +0200
Subject: [PATCH] btrfs-progs: build: note minimal version for zoned support

The configure phase can detect the following:

- no /usr/include/blkzoned.h - no zoned support possible
- usable /usr/include/blkzoned.h - on by default
- present /usr/include/blkzoned.h but unusable due to missing struct
  members or ioctl defintion

Case 3 could be confusing, so document the requirements.

Issue: #370
Signed-off-by: David Sterba <dsterba@suse.com>
---
 INSTALL | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/INSTALL b/INSTALL
index 77128240..302b39a8 100644
--- a/INSTALL
+++ b/INSTALL
@@ -22,6 +22,9 @@ dependencies are not desired.
 - libsodium
 - libkcapi
 
+For zoned device support, the system headers installed in /usr/include/linux
+must be 5.10 or newer.
+
 Generating documentation:
 
 - asciidoc - text document format tool