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miext: damage: fix ABI mismatch caused by Xorg patch

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The xorg commit da72833185 which had been
cherry-picked introduces a new field in the middle of the DamageRec struct,
which is part of the public driver ABI.

It broke at least the amdgpu driver (at time of writing no others known yet)

So doing what's the correct approach here: always put new fields at the
end of the struct, never change existing layout.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
This commit is contained in:
Enrico Weigelt, metux IT consult 2026-11-13 14:38:06 +01:00
commit 200112b356
1 changed files with 9 additions and 6 deletions
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15
miext/damage/damagestr.h
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@ -1,3 +1,4 @@
/* PART OF PUBLIC SDK */
/*
* Copyright © 2003 Keith Packard
*
@ -35,12 +36,6 @@
typedef struct _damage {
DamagePtr pNext;
DamagePtr pNextWin;
/*
* Head of the pNext list this damage is currently linked on, or NULL if it is not linked on any list. Recorded at
* insertion time so that removal always unlinks from the list the damage actually went onto; see
* damageInsertDamage().
*/
DamagePtr *pListHead;
RegionRec damage;
DamageReportLevel damageLevel;
@ -55,6 +50,14 @@ typedef struct _damage {
Bool reportAfter;
RegionRec pendingDamage; /* will be flushed post submission at the latest */
ScreenPtr pScreen;
/* --- not part of ABI beyond here --- */
/*
* Head of the pNext list this damage is currently linked on, or NULL if it is not linked on any list. Recorded at
* insertion time so that removal always unlinks from the list the damage actually went onto; see
* damageInsertDamage().
*/
DamagePtr *pListHead;
} DamageRec;
typedef struct _damageScrPriv {