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Subject[PATCH v6 2/5] kaslr: give a warning if movable_node specified without kaslr_mem=
Date
Signed-off-by: Chao Fan <fanc.fnst@cn.fujitsu.com>
---
arch/x86/boot/compressed/kaslr.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index b071f6edd7b2..38816d3f8865 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -282,6 +282,16 @@ static int handle_mem_filter(void)
!strstr(args, "kaslr_mem="))
return 0;

+#ifdef CONFIG_MEMORY_HOTPLUG
+ /*
+ * Check if "kaslr_mem=" specified when "movable_node" found. If not,
+ * just give warrning. Otherwise memory hotplug could be
+ * affected if kernel put on movable memory regions.
+ */
+ if (strstr(args, "movable_node") && !strstr(args, "kaslr_mem="))
+ warn("kaslr_mem= should specified when using movable_node.\n");
+#endif
+
tmp_cmdline = malloc(len + 1);
if (!tmp_cmdline)
error("Failed to allocate space for tmp_cmdline");
--
2.14.3


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