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Message-ID: <64fa89f416f22a60ae74cfff8fd565e7677be192.1769097829.git.lorenzo.stoakes@oracle.com>
Date: Thu, 22 Jan 2026 16:06:10 +0000
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Jarkko Sakkinen <jarkko@...nel.org>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Thomas Gleixner <tglx@...nel.org>, Ingo Molnar <mingo@...hat.com>,
Borislav Petkov <bp@...en8.de>, x86@...nel.org,
"H . Peter Anvin" <hpa@...or.com>, Arnd Bergmann <arnd@...db.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Dan Williams <dan.j.williams@...el.com>,
Vishal Verma <vishal.l.verma@...el.com>,
Dave Jiang <dave.jiang@...el.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
Tvrtko Ursulin <tursulin@...ulin.net>,
Christian Koenig <christian.koenig@....com>,
Huang Rui <ray.huang@....com>, Matthew Auld <matthew.auld@...el.com>,
Matthew Brost <matthew.brost@...el.com>,
Alexander Viro <viro@...iv.linux.org.uk>,
Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
Benjamin LaHaise <bcrl@...ck.org>, Gao Xiang <xiang@...nel.org>,
Chao Yu <chao@...nel.org>, Yue Hu <zbestahu@...il.com>,
Jeffle Xu <jefflexu@...ux.alibaba.com>,
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Hongbo Li <lihongbo22@...wei.com>, Chunhai Guo <guochunhai@...o.com>,
Theodore Ts'o <tytso@....edu>,
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Muchun Song <muchun.song@...ux.dev>,
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Konstantin Komarov <almaz.alexandrovich@...agon-software.com>,
Mike Marshall <hubcap@...ibond.com>,
Martin Brandenburg <martin@...ibond.com>,
Tony Luck <tony.luck@...el.com>,
Reinette Chatre <reinette.chatre@...el.com>,
Dave Martin <Dave.Martin@....com>, James Morse <james.morse@....com>,
Babu Moger <babu.moger@....com>, Carlos Maiolino <cem@...nel.org>,
Damien Le Moal <dlemoal@...nel.org>,
Naohiro Aota <naohiro.aota@....com>,
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"Liam R . Howlett" <Liam.Howlett@...cle.com>,
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Dev Jain <dev.jain@....com>, Barry Song <baohua@...nel.org>,
Lance Yang <lance.yang@...ux.dev>, Jann Horn <jannh@...gle.com>,
Pedro Falcato <pfalcato@...e.de>, David Howells <dhowells@...hat.com>,
Paul Moore <paul@...l-moore.com>, James Morris <jmorris@...ei.org>,
"Serge E . Hallyn" <serge@...lyn.com>,
Yury Norov <yury.norov@...il.com>,
Rasmus Villemoes <linux@...musvillemoes.dk>, linux-sgx@...r.kernel.org,
linux-kernel@...r.kernel.org, nvdimm@...ts.linux.dev,
linux-cxl@...r.kernel.org, dri-devel@...ts.freedesktop.org,
intel-gfx@...ts.freedesktop.org, linux-fsdevel@...r.kernel.org,
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devel@...ts.orangefs.org, linux-xfs@...r.kernel.org,
keyrings@...r.kernel.org, linux-security-module@...r.kernel.org,
Jason Gunthorpe <jgg@...dia.com>
Subject: [PATCH v2 01/13] mm/vma: remove __private sparse decoration from vma_flags_t
We need to pass around these values and access them in a way that sparse
does not allow, as __private implies noderef, i.e. disallowing dereference
of the value, which manifests as sparse warnings even when passed around
benignly.
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
---
include/linux/mm.h | 4 ++--
include/linux/mm_types.h | 14 ++++++++------
2 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index d7ca837dd8a5..776a7e03f88b 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -943,7 +943,7 @@ static inline void vm_flags_reset_once(struct vm_area_struct *vma,
* system word.
*/
if (NUM_VMA_FLAG_BITS > BITS_PER_LONG) {
- unsigned long *bitmap = ACCESS_PRIVATE(&vma->flags, __vma_flags);
+ unsigned long *bitmap = vma->flags.__vma_flags;
bitmap_zero(&bitmap[1], NUM_VMA_FLAG_BITS - BITS_PER_LONG);
}
@@ -1006,7 +1006,7 @@ static inline bool __vma_flag_atomic_valid(struct vm_area_struct *vma,
static inline void vma_flag_set_atomic(struct vm_area_struct *vma,
vma_flag_t bit)
{
- unsigned long *bitmap = ACCESS_PRIVATE(&vma->flags, __vma_flags);
+ unsigned long *bitmap = vma->flags.__vma_flags;
vma_assert_stabilised(vma);
if (__vma_flag_atomic_valid(vma, bit))
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index e5ee66f84d9a..592ad065fa75 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -866,7 +866,7 @@ struct mmap_action {
#define NUM_VMA_FLAG_BITS BITS_PER_LONG
typedef struct {
DECLARE_BITMAP(__vma_flags, NUM_VMA_FLAG_BITS);
-} __private vma_flags_t;
+} vma_flags_t;
/*
* Describes a VMA that is about to be mmap()'ed. Drivers may choose to
@@ -1056,7 +1056,7 @@ struct vm_area_struct {
/* Clears all bits in the VMA flags bitmap, non-atomically. */
static inline void vma_flags_clear_all(vma_flags_t *flags)
{
- bitmap_zero(ACCESS_PRIVATE(flags, __vma_flags), NUM_VMA_FLAG_BITS);
+ bitmap_zero(flags->__vma_flags, NUM_VMA_FLAG_BITS);
}
/*
@@ -1067,7 +1067,9 @@ static inline void vma_flags_clear_all(vma_flags_t *flags)
*/
static inline void vma_flags_overwrite_word(vma_flags_t *flags, unsigned long value)
{
- *ACCESS_PRIVATE(flags, __vma_flags) = value;
+ unsigned long *bitmap = flags->__vma_flags;
+
+ bitmap[0] = value;
}
/*
@@ -1078,7 +1080,7 @@ static inline void vma_flags_overwrite_word(vma_flags_t *flags, unsigned long va
*/
static inline void vma_flags_overwrite_word_once(vma_flags_t *flags, unsigned long value)
{
- unsigned long *bitmap = ACCESS_PRIVATE(flags, __vma_flags);
+ unsigned long *bitmap = flags->__vma_flags;
WRITE_ONCE(*bitmap, value);
}
@@ -1086,7 +1088,7 @@ static inline void vma_flags_overwrite_word_once(vma_flags_t *flags, unsigned lo
/* Update the first system word of VMA flags setting bits, non-atomically. */
static inline void vma_flags_set_word(vma_flags_t *flags, unsigned long value)
{
- unsigned long *bitmap = ACCESS_PRIVATE(flags, __vma_flags);
+ unsigned long *bitmap = flags->__vma_flags;
*bitmap |= value;
}
@@ -1094,7 +1096,7 @@ static inline void vma_flags_set_word(vma_flags_t *flags, unsigned long value)
/* Update the first system word of VMA flags clearing bits, non-atomically. */
static inline void vma_flags_clear_word(vma_flags_t *flags, unsigned long value)
{
- unsigned long *bitmap = ACCESS_PRIVATE(flags, __vma_flags);
+ unsigned long *bitmap = flags->__vma_flags;
*bitmap &= ~value;
}
--
2.52.0
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