[Xen-changelog] [xen staging] x86: shrink video_{flags, mode} to {8, 16} bits

[patchbot@xxxxxxx]

commit e8e9f4b9820fd48bcb0bcb5b7c655224fd71173d
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Mon Sep 2 14:45:57 2019 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Sep 2 14:45:57 2019 +0200

    x86: shrink video_{flags,mode} to {8,16} bits
    
    We really don't need them to be any wider.
    
    Also remove the C level declaration (and hence also the GLOBAL) of
    video_mode altogether; it's used in assembly code only.
    
    Suggested-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/boot/wakeup.S   | 5 ++---
 xen/include/asm-x86/config.h | 4 +++-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/xen/arch/x86/boot/wakeup.S b/xen/arch/x86/boot/wakeup.S
index 65ecd0300c..25ec2fa32b 100644
--- a/xen/arch/x86/boot/wakeup.S
+++ b/xen/arch/x86/boot/wakeup.S
@@ -82,10 +82,9 @@ bogus_real_magic:
 
         .align 4
 real_magic:     .long 0x12345678
-GLOBAL(video_mode)
-        .long 0
+video_mode:     .word 0
 GLOBAL(video_flags)
-        .long 0
+        .byte 0
 
         .code32
 
diff --git a/xen/include/asm-x86/config.h b/xen/include/asm-x86/config.h
index 22dc795eea..4370c2aff2 100644
--- a/xen/include/asm-x86/config.h
+++ b/xen/include/asm-x86/config.h
@@ -99,7 +99,9 @@ extern char trampoline_realmode_entry[];
 extern unsigned int trampoline_xen_phys_start;
 extern unsigned char trampoline_cpu_started;
 extern char wakeup_start[];
-extern unsigned int video_mode, video_flags;
+
+extern unsigned char video_flags;
+
 extern unsigned short boot_edid_caps;
 extern unsigned char boot_edid_info[128];
 #endif
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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