Re: [PATCH v17 03/10] x86: kdump: use macro CRASH_ADDR_LOW_MAX in functions reserve_crashkernel()

---
  arch/x86/kernel/setup.c | 7 ++++---
  1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 6424ee4f23da2cf..bb2a0973b98059e 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c

@@ -489,8 +489,9 @@ static void __init reserve_crashkernel(void)
  	if (!crash_base) {
  		/*
  		 * Set CRASH_ADDR_LOW_MAX upper bound for crash memory,
-		 * crashkernel=x,high reserves memory over 4G, also allocates
-		 * 256M extra low memory for DMA buffers and swiotlb.
+		 * crashkernel=x,high reserves memory over CRASH_ADDR_LOW_MAX,
+		 * also allocates 256M extra low memory for DMA buffers
+		 * and swiotlb.
  		 * But the extra memory is not required for all machines.
  		 * So try low memory first and fall back to high memory
  		 * unless "crashkernel=size[KMG],high" is specified.

@@ -518,7 +519,7 @@ static void __init reserve_crashkernel(void)
  		}
  	}
  
-	if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) {
+	if (crash_base >= CRASH_ADDR_LOW_MAX && reserve_crashkernel_low()) {
  		memblock_phys_free(crash_base, crash_size);
  		return;
  	}