From: Kairui Song <kasong@redhat.com>
Date: Tue, 20 Oct 2020 08:58:01 +0000 (+0800)
Subject: dracut-functions: add a helper to check if kernel module is available
X-Git-Tag: 051~43
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c050190f86c8e6e66087b7bd076f9ed117756d65;p=thirdparty%2Fdracut.git

dracut-functions: add a helper to check if kernel module is available

It's like check_kernel_config, help to check if a kernel module is
enabled (cover built-in or compiled module case).

Signed-off-by: Kairui Song <kasong@redhat.com>
---

diff --git a/dracut-functions.sh b/dracut-functions.sh
index e0ca75742..530452068 100755
--- a/dracut-functions.sh
+++ b/dracut-functions.sh
@@ -674,6 +674,11 @@ check_kernel_config()
     return 1
 }
 
+# 0 if the kernel module is either built-in or available
+# 1 if the kernel module is not enabled
+check_kernel_module() {
+    modprobe -S $kernel --dry-run $1 &>/dev/null || return 1
+}
 
 # get_cpu_vendor
 # Only two values are returned: AMD or Intel