linux-kernel - [PATCH 2/7] drm/gem-shmem: Export VM ops functions

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Message-Id: <20250318-drm-gem-shmem-v1-2-64b96511a84f@collabora.com>
Date: Tue, 18 Mar 2025 16:22:36 -0300
From: Daniel Almeida <daniel.almeida@...labora.com>
To: 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>, 
 Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
 Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
 Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
 Benno Lossin <benno.lossin@...ton.me>, 
 Andreas Hindborg <a.hindborg@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, 
 Trevor Gross <tmgross@...ch.edu>, Sumit Semwal <sumit.semwal@...aro.org>, 
 Christian König <christian.koenig@....com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 rust-for-linux@...r.kernel.org, linux-media@...r.kernel.org, 
 linaro-mm-sig@...ts.linaro.org, Danilo Krummrich <dakr@...nel.org>, 
 Asahi Lina <lina@...hilina.net>, 
 Daniel Almeida <daniel.almeida@...labora.com>
Subject: [PATCH 2/7] drm/gem-shmem: Export VM ops functions

From: Asahi Lina <lina@...hilina.net>

There doesn't seem to be a way for the Rust bindings to get a
compile-time constant reference to drm_gem_shmem_vm_ops, so we need to
duplicate that structure in Rust... this isn't nice...

Signed-off-by: Asahi Lina <lina@...hilina.net>
Signed-off-by: Daniel Almeida <daniel.almeida@...labora.com>
---
 drivers/gpu/drm/drm_gem_shmem_helper.c | 9 ++++++---
 include/drm/drm_gem_shmem_helper.h     | 3 +++
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index ec89e9499f5f02a2a35713669bf649dd2abb9938..be310db5863871604f3502ad1f419937d4c20a84 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -535,7 +535,7 @@ int drm_gem_shmem_dumb_create(struct drm_file *file, struct drm_device *dev,
 }
 EXPORT_SYMBOL_GPL(drm_gem_shmem_dumb_create);
 
-static vm_fault_t drm_gem_shmem_fault(struct vm_fault *vmf)
+vm_fault_t drm_gem_shmem_fault(struct vm_fault *vmf)
 {
 	struct vm_area_struct *vma = vmf->vma;
 	struct drm_gem_object *obj = vma->vm_private_data;
@@ -564,8 +564,9 @@ static vm_fault_t drm_gem_shmem_fault(struct vm_fault *vmf)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(drm_gem_shmem_fault);
 
-static void drm_gem_shmem_vm_open(struct vm_area_struct *vma)
+void drm_gem_shmem_vm_open(struct vm_area_struct *vma)
 {
 	struct drm_gem_object *obj = vma->vm_private_data;
 	struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj);
@@ -586,8 +587,9 @@ static void drm_gem_shmem_vm_open(struct vm_area_struct *vma)
 
 	drm_gem_vm_open(vma);
 }
+EXPORT_SYMBOL_GPL(drm_gem_shmem_vm_open);
 
-static void drm_gem_shmem_vm_close(struct vm_area_struct *vma)
+void drm_gem_shmem_vm_close(struct vm_area_struct *vma)
 {
 	struct drm_gem_object *obj = vma->vm_private_data;
 	struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj);
@@ -598,6 +600,7 @@ static void drm_gem_shmem_vm_close(struct vm_area_struct *vma)
 
 	drm_gem_vm_close(vma);
 }
+EXPORT_SYMBOL_GPL(drm_gem_shmem_vm_close);
 
 const struct vm_operations_struct drm_gem_shmem_vm_ops = {
 	.fault = drm_gem_shmem_fault,
diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h
index d22e3fb53631ab655748d7f6c628ffdb402f6324..b70d3cc35bd194e7cd718bee220408b5dda568bf 100644
--- a/include/drm/drm_gem_shmem_helper.h
+++ b/include/drm/drm_gem_shmem_helper.h
@@ -132,6 +132,9 @@ void drm_gem_shmem_print_info(const struct drm_gem_shmem_object *shmem,
 			      struct drm_printer *p, unsigned int indent);
 
 extern const struct vm_operations_struct drm_gem_shmem_vm_ops;
+vm_fault_t drm_gem_shmem_fault(struct vm_fault *vmf);
+void drm_gem_shmem_vm_open(struct vm_area_struct *vma);
+void drm_gem_shmem_vm_close(struct vm_area_struct *vma);
 
 /*
  * GEM object functions

-- 
2.48.1