File 0002-Reflect-__-start-end-_init_task-kernel-sym... of Package crash

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File 0002-Reflect-__-start-end-_init_task-kernel-symbols-renam.patch of Package crash

From: Alexander Gordeev <agordeev@linux.ibm.com>
Date: Wed, 10 Apr 2024 14:55:35 +0200
Subject: Reflect __{start,end}_init_task kernel symbols rename
Git-repo: https://github.com/crash-utility/crash.git
Git-commit: 3879e9104826d5ae14a0824ec47ab60056a249a7
Patch-mainline: 8.0.6
References: bsc#1228388

Kernel commit 8f69cba096b5 ("x86: Rename __{start,end}_init_task to
__{start,end}_init_stack") leads to failure when crash loading:

crash: invalid count request: 0

Assume both __{start,end}_init_task and __{start,end}_init_stack
symbols could exist for backward compatibility.

Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
---
 task.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/task.c b/task.c
index ebdb5be3786f..d52ce0becc74 100644
--- a/task.c
+++ b/task.c
@@ -496,10 +496,17 @@ task_init(void)
 	    	((len = SIZE(thread_union)) != STACKSIZE())) {
 		machdep->stacksize = len;
 	} else if (!VALID_SIZE(thread_union) && !VALID_SIZE(task_union)) {
-		if (kernel_symbol_exists("__start_init_task") &&
-		    kernel_symbol_exists("__end_init_task")) {
+		len = 0;
+		if (kernel_symbol_exists("__start_init_stack") &&
+		   kernel_symbol_exists("__end_init_stack")) {
+			len = symbol_value("__end_init_stack");
+			len -= symbol_value("__start_init_stack");
+		} else if (kernel_symbol_exists("__start_init_task") &&
+			kernel_symbol_exists("__end_init_task")) {
 			len = symbol_value("__end_init_task");
 			len -= symbol_value("__start_init_task");
+		}
+		if (len) {
 			ASSIGN_SIZE(thread_union) = len;
 			machdep->stacksize = len;
 		}
-- 
2.45.2

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