[PATCH] drm: xe: select configfs

[Arnd Bergmann <arnd@kernel.org>]

From: Arnd Bergmann <arnd@arndb.de>

The original addition of configfs to xe missed a compile-time dependency,
which leads to a link failure when configfs is enabled as a loadable module:

ld.lld-21: error: undefined symbol: xe_configfs_get_survivability_mode
>>> referenced by xe_survivability_mode.c:224
>>>               drivers/gpu/drm/xe/xe_survivability_mode.o:(xe_survivability_mode_is_requested) in archive vmlinux.a

A recent workaround added a 'IS_REACHABLE()' check around the calls into
configfs, which makes it link in this configuration, but this is generally
a bad idea because it makes the actual behavior inconsistent and confusing
to users that expect configfs to work if both xe and configfs are enabled.

Use 'select CONFIGFS_FS' instead, like every other configfs user does,
and remove the unnecessary stub functions. There is little practical
difference here as anyone using XE graphics is likely to have a complex
configuration that already selects configfs anyway, and the link error
or the IS_REACHABLE() would only manifest during randconfig testing.

Fixes: 30499cbd7961 ("drm/xe: Fix build with DRM_XE=y and CONFIGFS_FS=m")
Fixes: 16280ded45fb ("drm/xe: Add configfs to enable survivability mode")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/gpu/drm/xe/Kconfig       |  1 +
 drivers/gpu/drm/xe/xe_configfs.h | 30 ------------------------------
 2 files changed, 1 insertion(+), 30 deletions(-)

diff --git a/drivers/gpu/drm/xe/Kconfig b/drivers/gpu/drm/xe/Kconfig
index 4fc8abdc5cb6..b52a8dc28f97 100644
--- a/drivers/gpu/drm/xe/Kconfig
+++ b/drivers/gpu/drm/xe/Kconfig
@@ -11,6 +11,7 @@ config DRM_XE
 	# the shmem_readpage() which depends upon tmpfs
 	select SHMEM
 	select TMPFS
+	select CONFIGFS_FS
 	select DRM_BUDDY
 	select DRM_CLIENT_SELECTION
 	select DRM_KMS_HELPER
diff --git a/drivers/gpu/drm/xe/xe_configfs.h b/drivers/gpu/drm/xe/xe_configfs.h
index 327b648944ff..d726800de26a 100644
--- a/drivers/gpu/drm/xe/xe_configfs.h
+++ b/drivers/gpu/drm/xe/xe_configfs.h
@@ -14,7 +14,6 @@
 
 struct pci_dev;
 
-#if IS_REACHABLE(CONFIG_CONFIGFS_FS)
 int xe_configfs_init(void);
 void xe_configfs_exit(void);
 void xe_configfs_check_device(struct pci_dev *pdev);
@@ -36,34 +35,5 @@ u32 xe_configfs_get_ctx_restore_post_bb(struct pci_dev *pdev,
 unsigned int xe_configfs_get_max_vfs(struct pci_dev *pdev);
 bool xe_configfs_admin_only_pf(struct pci_dev *pdev);
 #endif
-#else
-static inline int xe_configfs_init(void) { return 0; }
-static inline void xe_configfs_exit(void) { }
-static inline void xe_configfs_check_device(struct pci_dev *pdev) { }
-static inline bool xe_configfs_get_survivability_mode(struct pci_dev *pdev) { return false; }
-static inline bool xe_configfs_primary_gt_allowed(struct pci_dev *pdev) { return true; }
-static inline bool xe_configfs_media_gt_allowed(struct pci_dev *pdev) { return true; }
-static inline u64 xe_configfs_get_engines_allowed(struct pci_dev *pdev) { return U64_MAX; }
-static inline bool xe_configfs_get_psmi_enabled(struct pci_dev *pdev) { return false; }
-static inline bool xe_configfs_get_enable_multi_queue(struct pci_dev *pdev) { return true; }
-static inline u32 xe_configfs_get_migrate_ulls_period_ms(struct pci_dev *pdev) { return 5; }
-static inline bool xe_configfs_get_disable_vram_page_offline(struct pci_dev *pdev) { return false; }
-static inline u32 xe_configfs_get_ctx_restore_mid_bb(struct pci_dev *pdev,
-						     enum xe_engine_class class,
-						     const u32 **cs) { return 0; }
-static inline u32 xe_configfs_get_ctx_restore_post_bb(struct pci_dev *pdev,
-						      enum xe_engine_class class,
-						      const u32 **cs) { return 0; }
-#ifdef CONFIG_PCI_IOV
-static inline unsigned int xe_configfs_get_max_vfs(struct pci_dev *pdev)
-{
-	return xe_modparam.max_vfs;
-}
-static inline bool xe_configfs_admin_only_pf(struct pci_dev *pdev)
-{
-	return XE_DEFAULT_ADMIN_ONLY_PF;
-}
-#endif
-#endif
 
 #endif
-- 
2.53.0