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| author | Christian Brauner <brauner@kernel.org> | 2024-08-09 13:38:56 +0300 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-08-30 09:22:36 +0300 |
| commit | 641bb4394f405cba498b100b44541ffc0aed5be1 (patch) | |
| tree | 1d7c809f5b6f66707f82dc7ad3b3805f3263496b /include | |
| parent | 8447d848e1dc6d42d1dcd00f133d7715fc732c47 (diff) | |
| download | linux-641bb4394f405cba498b100b44541ffc0aed5be1.tar.xz | |
fs: move FMODE_UNSIGNED_OFFSET to fop_flags
This is another flag that is statically set and doesn't need to use up
an FMODE_* bit. Move it to ->fop_flags and free up another FMODE_* bit.
(1) mem_open() used from proc_mem_operations
(2) adi_open() used from adi_fops
(3) drm_open_helper():
(3.1) accel_open() used from DRM_ACCEL_FOPS
(3.2) drm_open() used from
(3.2.1) amdgpu_driver_kms_fops
(3.2.2) psb_gem_fops
(3.2.3) i915_driver_fops
(3.2.4) nouveau_driver_fops
(3.2.5) panthor_drm_driver_fops
(3.2.6) radeon_driver_kms_fops
(3.2.7) tegra_drm_fops
(3.2.8) vmwgfx_driver_fops
(3.2.9) xe_driver_fops
(3.2.10) DRM_GEM_FOPS
(3.2.11) DEFINE_DRM_GEM_DMA_FOPS
(4) struct memdev sets fmode flags based on type of device opened. For
devices using struct mem_fops unsigned offset is used.
Mark all these file operations as FOP_UNSIGNED_OFFSET and add asserts
into the open helper to ensure that the flag is always set.
Link: https://lore.kernel.org/r/20240809-work-fop_unsigned-v1-1-658e054d893e@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/drm_accel.h | 3 | ||||
| -rw-r--r-- | include/drm/drm_gem.h | 3 | ||||
| -rw-r--r-- | include/drm/drm_gem_dma_helper.h | 1 | ||||
| -rw-r--r-- | include/linux/fs.h | 5 |
4 files changed, 8 insertions, 4 deletions
diff --git a/include/drm/drm_accel.h b/include/drm/drm_accel.h index f4d3784b1dce..41c78b7d712c 100644 --- a/include/drm/drm_accel.h +++ b/include/drm/drm_accel.h @@ -28,7 +28,8 @@ .poll = drm_poll,\ .read = drm_read,\ .llseek = noop_llseek, \ - .mmap = drm_gem_mmap + .mmap = drm_gem_mmap, \ + .fop_flags = FOP_UNSIGNED_OFFSET /** * DEFINE_DRM_ACCEL_FOPS() - macro to generate file operations for accelerators drivers diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index bae4865b2101..d8b86df2ec0d 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -447,7 +447,8 @@ struct drm_gem_object { .poll = drm_poll,\ .read = drm_read,\ .llseek = noop_llseek,\ - .mmap = drm_gem_mmap + .mmap = drm_gem_mmap, \ + .fop_flags = FOP_UNSIGNED_OFFSET /** * DEFINE_DRM_GEM_FOPS() - macro to generate file operations for GEM drivers diff --git a/include/drm/drm_gem_dma_helper.h b/include/drm/drm_gem_dma_helper.h index a827bde494f6..f2678e7ecb98 100644 --- a/include/drm/drm_gem_dma_helper.h +++ b/include/drm/drm_gem_dma_helper.h @@ -267,6 +267,7 @@ unsigned long drm_gem_dma_get_unmapped_area(struct file *filp, .read = drm_read,\ .llseek = noop_llseek,\ .mmap = drm_gem_mmap,\ + .fop_flags = FOP_UNSIGNED_OFFSET, \ DRM_GEM_DMA_UNMAPPED_AREA_FOPS \ } diff --git a/include/linux/fs.h b/include/linux/fs.h index 696c620f90e0..0145bda465ff 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -146,8 +146,7 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset, /* Expect random access pattern */ #define FMODE_RANDOM ((__force fmode_t)(1 << 12)) -/* File is huge (eg. /dev/mem): treat loff_t as unsigned */ -#define FMODE_UNSIGNED_OFFSET ((__force fmode_t)(1 << 13)) +/* FMODE_* bit 13 */ /* File is opened with O_PATH; almost nothing can be done with it */ #define FMODE_PATH ((__force fmode_t)(1 << 14)) @@ -2073,6 +2072,8 @@ struct file_operations { #define FOP_DIO_PARALLEL_WRITE ((__force fop_flags_t)(1 << 3)) /* Contains huge pages */ #define FOP_HUGE_PAGES ((__force fop_flags_t)(1 << 4)) +/* Treat loff_t as unsigned (e.g., /dev/mem) */ +#define FOP_UNSIGNED_OFFSET ((__force fop_flags_t)(1 << 5)) /* Wrap a directory iterator that needs exclusive inode access */ int wrap_directory_iterator(struct file *, struct dir_context *, |