linux-kernel - [PATCH 4/4] kernel: only define task_struct

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Date:   Mon, 12 Aug 2019 08:55:24 +0200
From:   Christoph Hellwig <hch@....de>
To:     Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghua.yu@...el.com>
Cc:     linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] kernel: only define task_struct_whitelist conditionally

If CONFIG_ARCH_TASK_STRUCT_ALLOCATOR is set task_struct_whitelist is
never called, and thus generates a compiler warning.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 kernel/fork.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/fork.c b/kernel/fork.c
index 2852d0e76ea3..f79e3da0caaf 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -768,6 +768,7 @@ static void set_max_threads(unsigned int max_threads_suggested)
 int arch_task_struct_size __read_mostly;
 #endif
 
+#ifndef CONFIG_ARCH_TASK_STRUCT_ALLOCATOR
 static void task_struct_whitelist(unsigned long *offset, unsigned long *size)
 {
 	/* Fetch thread_struct whitelist for the architecture. */
@@ -782,6 +783,7 @@ static void task_struct_whitelist(unsigned long *offset, unsigned long *size)
 	else
 		*offset += offsetof(struct task_struct, thread);
 }
+#endif /* CONFIG_ARCH_TASK_STRUCT_ALLOCATOR */
 
 void __init fork_init(void)
 {
-- 
2.20.1