---

yaml
---
r: 94993
b: refs/heads/master
c: 42173f6
h: refs/heads/master
i:
  94991: d8c2759
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a94a630a4c69430bb4562ab8252104449bba9a67
+refs/heads/master: 42173f6860af7e016a950a9a19a66679cfc46d98

trunk/Documentation/DMA-API.txt

@@ -145,7 +145,7 @@ Part Ic - DMA addressing limitations
 int
 dma_supported(struct device *dev, u64 mask)
 int
-pci_dma_supported(struct pci_dev *hwdev, u64 mask)
+pci_dma_supported(struct device *dev, u64 mask)
 
 Checks to see if the device can support DMA to the memory described by
 mask.
@@ -189,7 +189,7 @@ dma_addr_t
 dma_map_single(struct device *dev, void *cpu_addr, size_t size,
 		      enum dma_data_direction direction)
 dma_addr_t
-pci_map_single(struct pci_dev *hwdev, void *cpu_addr, size_t size,
+pci_map_single(struct device *dev, void *cpu_addr, size_t size,
 		      int direction)
 
 Maps a piece of processor virtual memory so it can be accessed by the
@@ -395,71 +395,6 @@ Notes:  You must do this:
 
 See also dma_map_single().
 
-dma_addr_t
-dma_map_single_attrs(struct device *dev, void *cpu_addr, size_t size,
-		     enum dma_data_direction dir,
-		     struct dma_attrs *attrs)
-
-void
-dma_unmap_single_attrs(struct device *dev, dma_addr_t dma_addr,
-		       size_t size, enum dma_data_direction dir,
-		       struct dma_attrs *attrs)
-
-int
-dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
-		 int nents, enum dma_data_direction dir,
-		 struct dma_attrs *attrs)
-
-void
-dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sgl,
-		   int nents, enum dma_data_direction dir,
-		   struct dma_attrs *attrs)
-
-The four functions above are just like the counterpart functions
-without the _attrs suffixes, except that they pass an optional
-struct dma_attrs*.
-
-struct dma_attrs encapsulates a set of "dma attributes". For the
-definition of struct dma_attrs see linux/dma-attrs.h.
-
-The interpretation of dma attributes is architecture-specific, and
-each attribute should be documented in Documentation/DMA-attributes.txt.
-
-If struct dma_attrs* is NULL, the semantics of each of these
-functions is identical to those of the corresponding function
-without the _attrs suffix. As a result dma_map_single_attrs()
-can generally replace dma_map_single(), etc.
-
-As an example of the use of the *_attrs functions, here's how
-you could pass an attribute DMA_ATTR_FOO when mapping memory
-for DMA:
-
-#include <linux/dma-attrs.h>
-/* DMA_ATTR_FOO should be defined in linux/dma-attrs.h and
- * documented in Documentation/DMA-attributes.txt */
-...
-
-	DEFINE_DMA_ATTRS(attrs);
-	dma_set_attr(DMA_ATTR_FOO, &attrs);
-	....
-	n = dma_map_sg_attrs(dev, sg, nents, DMA_TO_DEVICE, &attr);
-	....
-
-Architectures that care about DMA_ATTR_FOO would check for its
-presence in their implementations of the mapping and unmapping
-routines, e.g.:
-
-void whizco_dma_map_sg_attrs(struct device *dev, dma_addr_t dma_addr,
-			     size_t size, enum dma_data_direction dir,
-			     struct dma_attrs *attrs)
-{
-	....
-	int foo =  dma_get_attr(DMA_ATTR_FOO, attrs);
-	....
-	if (foo)
-		/* twizzle the frobnozzle */
-	....
-
 
 Part II - Advanced dma_ usage
 -----------------------------

trunk/Documentation/DMA-mapping.txt

@@ -315,11 +315,11 @@ you should do:
 
 	dma_addr_t dma_handle;
 
-	cpu_addr = pci_alloc_consistent(pdev, size, &dma_handle);
+	cpu_addr = pci_alloc_consistent(dev, size, &dma_handle);
 
-where pdev is a struct pci_dev *. This may be called in interrupt context.
-You should use dma_alloc_coherent (see DMA-API.txt) for buses
-where devices don't have struct pci_dev (like ISA, EISA).
+where dev is a struct pci_dev *. You should pass NULL for PCI like buses
+where devices don't have struct pci_dev (like ISA, EISA).  This may be
+called in interrupt context. 
 
 This argument is needed because the DMA translations may be bus
 specific (and often is private to the bus which the device is attached
@@ -332,7 +332,7 @@ __get_free_pages (but takes size instead of a page order).  If your
 driver needs regions sized smaller than a page, you may prefer using
 the pci_pool interface, described below.
 
-The consistent DMA mapping interfaces, for non-NULL pdev, will by
+The consistent DMA mapping interfaces, for non-NULL dev, will by
 default return a DMA address which is SAC (Single Address Cycle)
 addressable.  Even if the device indicates (via PCI dma mask) that it
 may address the upper 32-bits and thus perform DAC cycles, consistent
@@ -354,9 +354,9 @@ buffer you receive will not cross a 64K boundary.
 
 To unmap and free such a DMA region, you call:
 
-	pci_free_consistent(pdev, size, cpu_addr, dma_handle);
+	pci_free_consistent(dev, size, cpu_addr, dma_handle);
 
-where pdev, size are the same as in the above call and cpu_addr and
+where dev, size are the same as in the above call and cpu_addr and
 dma_handle are the values pci_alloc_consistent returned to you.
 This function may not be called in interrupt context.
 
@@ -371,9 +371,9 @@ Create a pci_pool like this:
 
 	struct pci_pool *pool;
 
-	pool = pci_pool_create(name, pdev, size, align, alloc);
+	pool = pci_pool_create(name, dev, size, align, alloc);
 
-The "name" is for diagnostics (like a kmem_cache name); pdev and size
+The "name" is for diagnostics (like a kmem_cache name); dev and size
 are as above.  The device's hardware alignment requirement for this
 type of data is "align" (which is expressed in bytes, and must be a
 power of two).  If your device has no boundary crossing restrictions,
@@ -472,11 +472,11 @@ To map a single region, you do:
 	void *addr = buffer->ptr;
 	size_t size = buffer->len;
 
-	dma_handle = pci_map_single(pdev, addr, size, direction);
+	dma_handle = pci_map_single(dev, addr, size, direction);
 
 and to unmap it:
 
-	pci_unmap_single(pdev, dma_handle, size, direction);
+	pci_unmap_single(dev, dma_handle, size, direction);
 
 You should call pci_unmap_single when the DMA activity is finished, e.g.
 from the interrupt which told you that the DMA transfer is done.
@@ -493,17 +493,17 @@ Specifically:
 	unsigned long offset = buffer->offset;
 	size_t size = buffer->len;
 
-	dma_handle = pci_map_page(pdev, page, offset, size, direction);
+	dma_handle = pci_map_page(dev, page, offset, size, direction);
 
 	...
 
-	pci_unmap_page(pdev, dma_handle, size, direction);
+	pci_unmap_page(dev, dma_handle, size, direction);
 
 Here, "offset" means byte offset within the given page.
 
 With scatterlists, you map a region gathered from several regions by:
 
-	int i, count = pci_map_sg(pdev, sglist, nents, direction);
+	int i, count = pci_map_sg(dev, sglist, nents, direction);
 	struct scatterlist *sg;
 
 	for_each_sg(sglist, sg, count, i) {
@@ -527,7 +527,7 @@ accessed sg->address and sg->length as shown above.
 
 To unmap a scatterlist, just call:
 
-	pci_unmap_sg(pdev, sglist, nents, direction);
+	pci_unmap_sg(dev, sglist, nents, direction);
 
 Again, make sure DMA activity has already finished.
 
@@ -550,19 +550,19 @@ correct copy of the DMA buffer.
 So, firstly, just map it with pci_map_{single,sg}, and after each DMA
 transfer call either:
 
-	pci_dma_sync_single_for_cpu(pdev, dma_handle, size, direction);
+	pci_dma_sync_single_for_cpu(dev, dma_handle, size, direction);
 
 or:
 
-	pci_dma_sync_sg_for_cpu(pdev, sglist, nents, direction);
+	pci_dma_sync_sg_for_cpu(dev, sglist, nents, direction);
 
 as appropriate.
 
 Then, if you wish to let the device get at the DMA area again,
 finish accessing the data with the cpu, and then before actually
 giving the buffer to the hardware call either:
 
-	pci_dma_sync_single_for_device(pdev, dma_handle, size, direction);
+	pci_dma_sync_single_for_device(dev, dma_handle, size, direction);
 
 or:
 
@@ -739,7 +739,7 @@ failure can be determined by:
 
 	dma_addr_t dma_handle;
 
-	dma_handle = pci_map_single(pdev, addr, size, direction);
+	dma_handle = pci_map_single(dev, addr, size, direction);
 	if (pci_dma_mapping_error(dma_handle)) {
 		/*
 		 * reduce current DMA mapping usage,

trunk/Documentation/cgroups.txt

@@ -500,7 +500,8 @@ post-attachment activity that requires memory allocations or blocking.
 
 void fork(struct cgroup_subsy *ss, struct task_struct *task)
 
-Called when a task is forked into a cgroup.
+Called when a task is forked into a cgroup. Also called during
+registration for all existing tasks.
 
 void exit(struct cgroup_subsys *ss, struct task_struct *task)