[xen staging] x86/boot: re-order .init.data contributions

[patchbot@xxxxxxx]

commit 35910ed65f1d188774ce90ba9898ca33f7a9fe4d
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu Apr 3 09:39:52 2025 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Apr 3 09:39:52 2025 +0200

    x86/boot: re-order .init.data contributions
    
    Putting a few bytes ahead of page tables isn't very efficient; there's
    a gap almost worth a full page. To avoid re-ordering of items in the
    source file, simply put the few small items in sub-section 1, for them
    to end up after the page tables, followed (in the final binary) by non-
    page-aligned items from other CUs.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Jason Andryuk <jason.andryuk@xxxxxxx>
---
 xen/arch/x86/boot/head.S | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xen/arch/x86/boot/head.S b/xen/arch/x86/boot/head.S
index 81473578fe..77bb7a9e21 100644
--- a/xen/arch/x86/boot/head.S
+++ b/xen/arch/x86/boot/head.S
@@ -136,6 +136,7 @@ multiboot2_header:
 .Lno_nx_msg:   .asciz "ERR: Not an NX-capable CPU!"
 
         .section .init.data, "aw", @progbits
+        .subsection 1 /* Put data here after the page tables (in x86_64.S). */
         .align 4
 
         .word   0
--
generated by git-patchbot for /home/xen/git/xen.git#staging