[PATCH v3 1/6] xen/arm: Skip initializing the BSS section when it is empty

[Ayan Kumar Halder]

If the BSS section is empty, then the function can just return.

Signed-off-by: Ayan Kumar Halder <ayan.kumar.hal...@amd.com>
---
Changes from :-

v1..v2 - New patch introduced in v3. 

 xen/arch/arm/arm64/head.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xen/arch/arm/arm64/head.S b/xen/arch/arm/arm64/head.S
index 14c3720d80..72c7b24498 100644
--- a/xen/arch/arm/arm64/head.S
+++ b/xen/arch/arm/arm64/head.S
@@ -346,6 +346,8 @@ FUNC_LOCAL(zero_bss)
         PRINT("- Zero BSS -\r\n")
         ldr   x0, =__bss_start       /* x0 := vaddr(__bss_start) */
         ldr   x1, =__bss_end         /* x1 := vaddr(__bss_end)   */
+        cmp   x1, x0
+        beq   skip_bss
 
 1:      str   xzr, [x0], #8
         cmp   x0, x1
-- 
2.25.1