lwn.git/drivers/usb/mon/mon_text.c, branch v2.6.33.1-rt9

USB: add scatter-gather support to usbmon

2009-12-11T19:55:20+00:00

This patch (as1301) adds support to usbmon for scatter-gather URBs. The text interface looks at only the first scatterlist element, since it never copies more than 32 bytes of data anyway. The binary interface copies as much data as possible up to the first non-addressable buffer. Signed-off-by: Alan Stern CC: Pete Zaitcev Signed-off-by: Greg Kroah-Hartman

USB: usbmon: end ugly tricks with DMA peeking

2009-09-23T13:46:19+00:00

This patch fixes crashes when usbmon attempts to access GART aperture. The old code attempted to take a bus address and convert it into a virtual address, which clearly was impossible on systems with actual IOMMUs. Let us not persist in this foolishness, and use transfer_buffer in all cases instead. I think downsides are negligible. The ones I see are: - A driver may pass an address of one buffer down as transfer_buffer, and entirely different entity mapped for DMA, resulting in misleading output of usbmon. Note, however, that PIO based controllers would do transfer the same data that usbmon sees here. - Out of tree drivers may crash usbmon if they store garbage in transfer_buffer. I inspected the in-tree drivers, and clarified the documentation in comments. - Drivers that use get_user_pages will not be possible to monitor. I only found one driver with this problem (drivers/staging/rspiusb). - Same happens with with usb_storage transferring from highmem, but it works fine on 64-bit systems, so I think it's not a concern. At least we don't crash anymore. Why didn't we do this in 2.6.10? That's because back in those days it was popular not to fill in transfer_buffer, so almost all traffic would be invisible (e.g. all of HID was like that). But now, the tree is almost 100% PIO friendly, so we can do the right thing at last. Signed-off-by: Pete Zaitcev Signed-off-by: Greg Kroah-Hartman

USB: usbmon: use the new usb debugfs directory

2009-06-16T04:44:43+00:00

All usb debugfs files should be behind the usb directory, not at the root of debugfs. Signed-off-by: Greg Kroah-Hartman

SL*B: drop kmem cache argument from constructor

2008-07-26T19:00:07+00:00

Kmem cache passed to constructor is only needed for constructors that are themselves multiplexeres. Nobody uses this "feature", nor does anybody uses passed kmem cache in non-trivial way, so pass only pointer to object. Non-trivial places are: arch/powerpc/mm/init_64.c arch/powerpc/mm/hugetlbpage.c This is flag day, yes. Signed-off-by: Alexey Dobriyan Acked-by: Pekka Enberg Acked-by: Christoph Lameter Cc: Jon Tollefson Cc: Nick Piggin Cc: Matt Mackall [akpm@linux-foundation.org: fix arch/powerpc/mm/hugetlbpage.c] [akpm@linux-foundation.org: fix mm/slab.c] [akpm@linux-foundation.org: fix ubifs] Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Slab API: remove useless ctor parameter and reorder parameters

2007-10-17T15:42:45+00:00

Slab constructors currently have a flags parameter that is never used. And the order of the arguments is opposite to other slab functions. The object pointer is placed before the kmem_cache pointer. Convert ctor(void *object, struct kmem_cache *s, unsigned long flags) to ctor(struct kmem_cache *s, void *object) throughout the kernel [akpm@linux-foundation.org: coupla fixes] Signed-off-by: Christoph Lameter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

USB: reorganize urb->status use in usbmon

2007-10-12T21:55:23+00:00

This patch (as978) reorganizes the way usbmon uses urb->status. It now accepts the status value as an argument. Signed-off-by: Alan Stern Acked-by: Pete Zaitcev Signed-off-by: Greg Kroah-Hartman

usbmon: Drop DMA mapping for setup packet

2007-10-12T21:55:14+00:00

Setup packet must be visible in virtual space. There's absolutely no good reason to implement any kind of zero-copy transfer of 8 bytes, and the documentation in usb.h is explicit about it. So, drop DMA remapping. Signed-off-by: Pete Zaitcev Signed-off-by: Greg Kroah-Hartman

usbmon: Update pipe removal to suit my taste

2007-10-12T21:55:14+00:00

This is a set of small updates to Alan's work to make the code more to my liking. Mostly premature optimizations, but also direction of control transfers in the binary interface was always out. Signed-off-by: Pete Zaitcev Cc: Alan Stern Signed-off-by: Greg Kroah-Hartman

USB: avoid urb->pipe in usbmon

2007-10-12T21:55:01+00:00

This patch (as949) changes the usbmon driver to use the new urb->ep field rather than urb->pipe. Signed-off-by: Alan Stern Cc: Pete Zaitcev Signed-off-by: Greg Kroah-Hartman

mm: Remove slab destructors from kmem_cache_create().

2007-07-20T01:11:58+00:00

Slab destructors were no longer supported after Christoph's c59def9f222d44bb7e2f0a559f2906191a0862d7 change. They've been BUGs for both slab and slub, and slob never supported them either. This rips out support for the dtor pointer from kmem_cache_create() completely and fixes up every single callsite in the kernel (there were about 224, not including the slab allocator definitions themselves, or the documentation references). Signed-off-by: Paul Mundt