From: Albert Herranz <albert_herranz@yahoo.es>
Date: Tue, 12 Jul 2005 20:58:34 +0000 (-0700)
Subject: [PATCH] kexec-ppc: fix for ksysfs crash_notes
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=bc75a24582f60a70e2b95fda94ff66f577b7a0db;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

[PATCH] kexec-ppc: fix for ksysfs crash_notes

The following patch prevents the crash dump helper code found within kexec
from breaking ppc which still lacks crash dump functionality.

ksysfs crash_notes attribute handling was left under CONFIG_KEXEC for
simplicity although it is not strictly kexec related.

We provide here a dummy definition for crash_notes on ppc.

Signed-off-by: Albert Herranz <albert_herranz@yahoo.es>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/ppc/kernel/machine_kexec.c b/arch/ppc/kernel/machine_kexec.c
index 84d65a87191..a72787747df 100644
--- a/arch/ppc/kernel/machine_kexec.c
+++ b/arch/ppc/kernel/machine_kexec.c
@@ -28,6 +28,12 @@ typedef NORET_TYPE void (*relocate_new_kernel_t)(
 const extern unsigned char relocate_new_kernel[];
 const extern unsigned int relocate_new_kernel_size;
 
+/*
+ * Provide a dummy crash_notes definition while crash dump arrives to ppc.
+ * This prevents breakage of crash_notes attribute in kernel/ksysfs.c.
+ */
+void *crash_notes = NULL;
+
 void machine_shutdown(void)
 {
 	if (ppc_md.machine_shutdown)
diff --git a/include/asm-ppc/kexec.h b/include/asm-ppc/kexec.h
index 73191310d8d..6d2aa0aa464 100644
--- a/include/asm-ppc/kexec.h
+++ b/include/asm-ppc/kexec.h
@@ -27,6 +27,8 @@
 
 #ifndef __ASSEMBLY__
 
+extern void *crash_notes;
+
 struct kimage;
 
 extern void machine_kexec_simple(struct kimage *image);