commit b3f0907c71e0 ("x86/mm: Add .bss..decrypted section to hold shared variables")
adds almost 2M memory usage on some kernels without CONFIG_AMD_MEM_ENCRYPT.
Fix it by guarding it with CONFIG_AMD_MEM_ENCRYPT.
Signed-off-by: Lepton Wu <ytht.net@xxxxxxxxx>
---
arch/x86/kernel/vmlinux.lds.S | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 54a5596adaa6..d39798a23f86 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -69,6 +69,8 @@ jiffies = jiffies_64;
#define ALIGN_ENTRY_TEXT_BEGIN . = ALIGN(PMD_SIZE);
#define ALIGN_ENTRY_TEXT_END . = ALIGN(PMD_SIZE);
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+
/*
* This section contains data which will be mapped as decrypted. Memory
* encryption operates on a page basis. Make this section PMD-aligned
@@ -88,6 +90,12 @@ jiffies = jiffies_64;
#else
+#define BSS_DECRYPTED
+
+#endif
+
+#else
+
#define X86_ALIGN_RODATA_BEGIN
#define X86_ALIGN_RODATA_END \
. = ALIGN(PAGE_SIZE); \
--
2.42.0.869.gea05f2083d-goog
