diff mbox series

x86/boot: re-order .init.data contributions

Message ID b0266c19-d0e5-4de7-b2fb-a50e2766168c@suse.com (mailing list archive)
State New
Headers show
Series x86/boot: re-order .init.data contributions | expand

Commit Message

Jan Beulich April 1, 2025, 5:56 a.m. UTC 
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@suse.com>
diff mbox series

Patch

--- 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