linux-kernel - [PATCH v2 01/16] initrd: Add generic code path for common initrd unloading logic.

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Date:   Sun, 25 Mar 2018 18:18:38 -0400
From:   Shea Levy <shea@...alevy.com>
To:     linux-alpha@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-snps-arc@...ts.infradead.org, linux-c6x-dev@...ux-c6x.org,
        uclinux-h8-devel@...ts.sourceforge.jp,
        linux-m68k@...ts.linux-m68k.org, nios2-dev@...ts.rocketboards.org,
        openrisc@...ts.librecores.org, linux-parisc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org,
        linux-sh@...r.kernel.org,
        user-mode-linux-devel@...ts.sourceforge.net
Cc:     Shea Levy <shea@...alevy.com>
Subject: [PATCH v2 01/16] initrd: Add generic code path for common initrd unloading logic.

Signed-off-by: Shea Levy <shea@...alevy.com>
---
 init/initramfs.c | 7 +++++++
 usr/Kconfig      | 4 ++++
 2 files changed, 11 insertions(+)

diff --git a/init/initramfs.c b/init/initramfs.c
index 7e99a0038942..5f2e3dba4822 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -526,6 +526,13 @@ extern unsigned long __initramfs_size;
 #include <linux/initrd.h>
 #include <linux/kexec.h>
 
+#ifdef CONFIG_INITRAMFS_GENERIC_UNLOAD
+void __init free_initrd_mem(unsigned long start, unsigned long end)
+{
+       free_reserved_area((void *)start, (void *)end, -1, "initrd");
+}
+#endif
+
 static void __init free_initrd(void)
 {
 #ifdef CONFIG_KEXEC_CORE
diff --git a/usr/Kconfig b/usr/Kconfig
index 43658b8a975e..fd79d4d6fa26 100644
--- a/usr/Kconfig
+++ b/usr/Kconfig
@@ -233,3 +233,7 @@ config INITRAMFS_COMPRESSION
 	default ".lzma" if RD_LZMA
 	default ".bz2"  if RD_BZIP2
 	default ""
+
+# Arches can select this for a generic initrd unloading codepath
+config INITRAMFS_GENERIC_UNLOAD
+	bool
-- 
2.16.2