From: Yuvraj Sakshith <yuvraj.sakshith@oss.qualcomm.com>
Date: Tue, 3 Mar 2026 11:30:31 +0000 (-0800)
Subject: mm/page_reporting: change PAGE_REPORTING_ORDER_UNSPECIFIED to -1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5467c292d07ffcd55a7a66af2259855f49e1dd06;p=thirdparty%2Fkernel%2Flinux.git

mm/page_reporting: change PAGE_REPORTING_ORDER_UNSPECIFIED to -1

PAGE_REPORTING_ORDER_UNSPECIFIED is now set to zero.  This means, pages of
order zero cannot be reported to a client/driver -- as zero is used to
signal a fallback to MAX_PAGE_ORDER.

Change PAGE_REPORTING_ORDER_UNSPECIFIED to (-1), so that zero can be used
as a valid order with which pages can be reported.

Link: https://lkml.kernel.org/r/20260303113032.3008371-5-yuvraj.sakshith@oss.qualcomm.com
Signed-off-by: Yuvraj Sakshith <yuvraj.sakshith@oss.qualcomm.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Eugenio Pérez <eperezma@redhat.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Long Li <longli@microsoft.com>
Cc: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wei Liu <wei.liu@kernel.org>
Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/include/linux/page_reporting.h b/include/linux/page_reporting.h
index d1886c6572859..9d4ca5c218a0f 100644
--- a/include/linux/page_reporting.h
+++ b/include/linux/page_reporting.h
@@ -7,7 +7,7 @@
 
 /* This value should always be a power of 2, see page_reporting_cycle() */
 #define PAGE_REPORTING_CAPACITY		32
-#define PAGE_REPORTING_ORDER_UNSPECIFIED	0
+#define PAGE_REPORTING_ORDER_UNSPECIFIED	-1
 
 struct page_reporting_dev_info {
 	/* function that alters pages to make them "reported" */