Some test cases use the getconf command to query the page size that the
kernel supports (e.g. scsi/011, throtl/{002,003,007}, zbd/{010,014}).
Add getconf to the list of required commands so its absence is reported
clearly, and document it as a dependency in README.md.

Link: https://lore.kernel.org/linux-block/ajm1x0koQ4BftBOc@shinmob/
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
---
 README.md | 1 +
 check     | 1 +
 2 files changed, 2 insertions(+)

diff --git a/README.md b/README.md
index b137a43..b62540a 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,7 @@ The dependencies are minimal, but make sure you have them installed:
 - fio
 - gcc
 - make
+- getconf
 - systemd-udev (udevadm)
 
 Some tests require the following:
diff --git a/check b/check
index a68049b..bc2dde9 100755
--- a/check
+++ b/check
@@ -1118,6 +1118,7 @@ _check_dependencies() {
 	required_commands_and_packages[blockdev]="util-linux"
 	required_commands_and_packages[fio]="fio"
 	required_commands_and_packages[udevadm]="systemd-udev"
+	required_commands_and_packages[getconf]="glibc-common or libc-bin"
 
 	for cmd in "${!required_commands_and_packages[@]}"; do
 		command -v "$cmd" &> /dev/null && continue
-- 
2.54.0