linux-kernel - [PATCH v2 12/12] drm/ttm: remove ttm_bo_default_io_mem

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Date:   Mon, 25 Dec 2017 11:43:34 +0800
From:   Tan Xiaojun <tanxiaojun@...wei.com>
To:     <seanpaul@...omium.org>, <christian.koenig@....com>,
        <airlied@...ux.ie>, <michel.daenzer@....com>,
        <alexander.deucher@....com>, <nicolai.haehnle@....com>,
        <thomas.lendacky@....com>, <yamada.masahiro@...ionext.com>,
        <msrb@...e.com>, <Felix.Kuehling@....com>, <dave.jiang@...el.com>,
        <gregkh@...uxfoundation.org>, <michael.thayer@...cle.com>,
        <hdegoede@...hat.com>
CC:     <daniel.vetter@...el.com>, <jani.nikula@...ux.intel.com>,
        <wangzhou1@...ilicon.com>, <dri-devel@...ts.freedesktop.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 12/12] drm/ttm: remove ttm_bo_default_io_mem_pfn

No one will use this function except ttm_bo_io_mem_pfn() now, so move
the calculation of ttm_bo_default_io_mem_pfn() into ttm_bo_io_mem_pfn()
and do some cleanup.

Signed-off-by: Tan Xiaojun <tanxiaojun@...wei.com>
---
 drivers/gpu/drm/ttm/ttm_bo_vm.c | 11 ++---------
 include/drm/ttm/ttm_bo_api.h    | 11 -----------
 2 files changed, 2 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 292d157..6edc19f 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -100,7 +100,8 @@ static unsigned long ttm_bo_io_mem_pfn(struct ttm_buffer_object *bo,
 	if (bdev->driver->io_mem_pfn)
 		return bdev->driver->io_mem_pfn(bo, page_offset);
 
-	return ttm_bo_default_io_mem_pfn(bo, page_offset);
+	return ((bo->mem.bus.base + bo->mem.bus.offset) >> PAGE_SHIFT)
+		+ page_offset;
 }
 
 static int ttm_bo_vm_fault(struct vm_fault *vmf)
@@ -415,14 +416,6 @@ static struct ttm_buffer_object *ttm_bo_vm_lookup(struct ttm_bo_device *bdev,
 	return bo;
 }
 
-unsigned long ttm_bo_default_io_mem_pfn(struct ttm_buffer_object *bo,
-					unsigned long page_offset)
-{
-	return ((bo->mem.bus.base + bo->mem.bus.offset) >> PAGE_SHIFT)
-		+ page_offset;
-}
-EXPORT_SYMBOL(ttm_bo_default_io_mem_pfn);
-
 int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
 		struct ttm_bo_device *bdev)
 {
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index fa07be1..0b1ce05 100644
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -711,17 +711,6 @@ extern int ttm_fbdev_mmap(struct vm_area_struct *vma,
 			  struct ttm_buffer_object *bo);
 
 /**
- * ttm_bo_default_iomem_pfn - get a pfn for a page offset
- *
- * @bo: the BO we need to look up the pfn for
- * @page_offset: offset inside the BO to look up.
- *
- * Calculate the PFN for iomem based mappings during page fault
- */
-unsigned long ttm_bo_default_io_mem_pfn(struct ttm_buffer_object *bo,
-				        unsigned long page_offset);
-
-/**
  * ttm_bo_mmap - mmap out of the ttm device address space.
  *
  * @filp:      filp as input from the mmap method.
-- 
2.7.4