drm: drop Linux < 2.6.15 support

Signed-off-by: Pekka Paalanen <pq@iki.fi>

5 files changed, 2 insertions, 142 deletions

diff --git a/linux-core/drm_bo.c b/linux-core/drm_bo.c
index 88b2ee66..3fb43fcb 100644
--- a/linux-core/drm_bo.c
+++ b/linux-core/drm_bo.c
@@ -2362,9 +2362,6 @@ int drm_bo_driver_finish(struct drm_device *dev)
 	if (list_empty(&bm->unfenced))
 		DRM_DEBUG("Unfenced list was clean\n");
 
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
-	ClearPageReserved(bm->dummy_read_page);
-#endif
 	__free_page(bm->dummy_read_page);
 
 out:
@@ -2397,10 +2394,6 @@ int drm_bo_driver_init(struct drm_device *dev)
 		goto out_unlock;
 	}
 
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
-	SetPageReserved(bm->dummy_read_page);
-#endif
-
 	/*
 	 * Initialize the system memory buffer type.
 	 * Other types need to be driver / IOCTL initialized.
diff --git a/linux-core/drm_compat.c b/linux-core/drm_compat.c
index 67baac5e..e90338f0 100644
--- a/linux-core/drm_compat.c
+++ b/linux-core/drm_compat.c
@@ -27,32 +27,6 @@
 
 #include "drmP.h"
 
-#if defined(CONFIG_X86) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
-
-/*
- * These have bad performance in the AGP module for the indicated kernel versions.
- */
-
-int drm_map_page_into_agp(struct page *page)
-{
-        int i;
-        i = change_page_attr(page, 1, PAGE_KERNEL_NOCACHE);
-        /* Caller's responsibility to call global_flush_tlb() for
-         * performance reasons */
-        return i;
-}
-
-int drm_unmap_page_from_agp(struct page *page)
-{
-        int i;
-        i = change_page_attr(page, 1, PAGE_KERNEL);
-        /* Caller's responsibility to call global_flush_tlb() for
-         * performance reasons */
-        return i;
-}
-#endif
-
-
 #if  (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
 
 /*
@@ -76,84 +50,8 @@ pgprot_t vm_get_page_prot(unsigned long vm_flags)
 #endif
 
 
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
-
-/*
- * vm code for kernels below 2.6.15 in which version a major vm write
- * occured. This implement a simple straightforward
- * version similar to what's going to be
- * in kernel 2.6.19+
- * Kernels below 2.6.15 use nopage whereas 2.6.19 and upwards use
- * nopfn.
- */
-
-static struct {
-	spinlock_t lock;
-	struct page *dummy_page;
-	atomic_t present;
-} drm_np_retry =
-{SPIN_LOCK_UNLOCKED, NOPAGE_OOM, ATOMIC_INIT(0)};
-
-
-static struct page *drm_bo_vm_fault(struct vm_area_struct *vma,
-				    struct fault_data *data);
-
-
-struct page * get_nopage_retry(void)
-{
-	if (atomic_read(&drm_np_retry.present) == 0) {
-		struct page *page = alloc_page(GFP_KERNEL);
-		if (!page)
-			return NOPAGE_OOM;
-		spin_lock(&drm_np_retry.lock);
-		drm_np_retry.dummy_page = page;
-		atomic_set(&drm_np_retry.present,1);
-		spin_unlock(&drm_np_retry.lock);
-	}
-	get_page(drm_np_retry.dummy_page);
-	return drm_np_retry.dummy_page;
-}
-
-void free_nopage_retry(void)
-{
-	if (atomic_read(&drm_np_retry.present) == 1) {
-		spin_lock(&drm_np_retry.lock);
-		__free_page(drm_np_retry.dummy_page);
-		drm_np_retry.dummy_page = NULL;
-		atomic_set(&drm_np_retry.present, 0);
-		spin_unlock(&drm_np_retry.lock);
-	}
-}
-
-struct page *drm_bo_vm_nopage(struct vm_area_struct *vma,
-			       unsigned long address,
-			       int *type)
-{
-	struct fault_data data;
-
-	if (type)
-		*type = VM_FAULT_MINOR;
-
-	data.address = address;
-	data.vma = vma;
-	drm_bo_vm_fault(vma, &data);
-	switch (data.type) {
-	case VM_FAULT_OOM:
-		return NOPAGE_OOM;
-	case VM_FAULT_SIGBUS:
-		return NOPAGE_SIGBUS;
-	default:
-		break;
-	}
-
-	return NOPAGE_REFAULT;
-}
-
-#endif
-
 #if !defined(DRM_FULL_MM_COMPAT) && \
-  ((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)) || \
-   (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)))
+  (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19))
 
 static int drm_pte_is_clear(struct vm_area_struct *vma,
 			    unsigned long addr)
diff --git a/linux-core/drm_compat.h b/linux-core/drm_compat.h
index 937908aa..d265ad12 100644
--- a/linux-core/drm_compat.h
+++ b/linux-core/drm_compat.h
@@ -152,8 +152,7 @@
 #include <linux/mm.h>
 #include <asm/page.h>
 
-#if ((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)) && \
-     (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)))
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
 #define DRM_ODD_MM_COMPAT
 #endif
 
@@ -184,27 +183,6 @@ extern pgprot_t vm_get_page_prot(unsigned long vm_flags);
 #define __GFP_DMA32 GFP_KERNEL
 #endif
 
-#if defined(CONFIG_X86) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
-
-/*
- * These are too slow in earlier kernels.
- */
-
-extern int drm_unmap_page_from_agp(struct page *page);
-extern int drm_map_page_into_agp(struct page *page);
-
-#define map_page_into_agp drm_map_page_into_agp
-#define unmap_page_from_agp drm_unmap_page_from_agp
-#endif
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
-extern struct page *get_nopage_retry(void);
-extern void free_nopage_retry(void);
-
-#define NOPAGE_REFAULT get_nopage_retry()
-#endif
-
-
 #ifndef DRM_FULL_MM_COMPAT
 
 /*
diff --git a/linux-core/drm_drv.c b/linux-core/drm_drv.c
index a32bfa3c..c68e237c 100644
--- a/linux-core/drm_drv.c
+++ b/linux-core/drm_drv.c
@@ -457,9 +457,6 @@ void drm_exit(struct drm_driver *driver)
 		idr_for_each(&drm_minors_idr, &drm_minors_cleanup, driver);
 	} else
 		pci_unregister_driver(&driver->pci_driver);
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
-	free_nopage_retry();
-#endif
 	DRM_INFO("Module unloaded\n");
 }
 EXPORT_SYMBOL(drm_exit);
diff --git a/linux-core/drm_ttm.c b/linux-core/drm_ttm.c
index 054a7ce8..cb3e7505 100644
--- a/linux-core/drm_ttm.c
+++ b/linux-core/drm_ttm.c
@@ -132,9 +132,6 @@ static struct page *drm_ttm_alloc_page(void)
 		drm_free_memctl(PAGE_SIZE);
 		return NULL;
 	}
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
-	SetPageReserved(page);
-#endif
 	return page;
 }
 
@@ -215,9 +212,6 @@ static void drm_ttm_free_alloced_pages(struct drm_ttm *ttm)
 	for (i = 0; i < ttm->num_pages; ++i) {
 		cur_page = ttm->pages + i;
 		if (*cur_page) {
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
-			ClearPageReserved(*cur_page);
-#endif
 			if (page_count(*cur_page) != 1)
 				DRM_ERROR("Erroneous page count. Leaking pages.\n");
 			if (page_mapped(*cur_page))