[PATCH 1/1] usb: xhci: dbc: Fix lockdep warning

The xHCI DbC implementation might enter a deadlock situation because there is no sufficient protection against the shared data between process and softirq contexts. This can lead to the following lockdep warnings. This patch changes to use spin_{,un}lock_irq{save,restore} to avoid potential deadloc

[PATCH v1 1/1] usb: xhci: do not create and register shared_hcd when USB3.0 is disabled

From: Tung Nguyen Currently, hcd->shared_hcd always creates and registers to the usb-core. If, for some reasons, USB3 downstream port is disabled, no roothub port for USB3.0 is found. This causes kernel to display an error: hub 2-0:1.0: config failed, hub doesn't have any ports! (err -19) This pa

[PATCH v5 69/78] vmalloc: Convert to XArray

From: Matthew Wilcox The radix tree of vmap blocks is simpler to express as an XArray. Saves a couple of hundred bytes of text and eliminates a user of the radix tree preload API. Signed-off-by: Matthew Wilcox --- mm/vmalloc.c | 39 +-- 1 file changed, 13 in

[PATCH v5 48/78] shmem: Convert shmem_alloc_hugepage to XArray

From: Matthew Wilcox xa_find() is a slightly easier API to use than radix_tree_gang_lookup_slot() because it contains its own RCU locking. Signed-off-by: Matthew Wilcox --- mm/shmem.c | 13 +++-- 1 file changed, 3 insertions(+), 10 deletions(-) diff --git a/mm/shmem.c b/mm/shmem.c ind

[PATCH v5 53/78] fs: Convert buffer to XArray

From: Matthew Wilcox Mostly comment fixes, but one use of __xa_set_tag. Signed-off-by: Matthew Wilcox --- fs/buffer.c | 14 +++--- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index 1a6ae530156b..e1d18307d5c8 100644 --- a/fs/buffer.c +++ b/fs/

[PATCH v5 57/78] lustre: Convert to XArray

From: Matthew Wilcox Signed-off-by: Matthew Wilcox --- drivers/staging/lustre/lustre/llite/glimpse.c | 12 +--- drivers/staging/lustre/lustre/mdc/mdc_request.c | 16 2 files changed, 13 insertions(+), 15 deletions(-) diff --git a/drivers/staging/lustre/lustre/llite/g

[PATCH v5 42/78] shmem: Convert replace to XArray

From: Matthew Wilcox shmem_radix_tree_replace() is renamed to shmem_xa_replace() and converted to use the XArray API. Signed-off-by: Matthew Wilcox --- mm/shmem.c | 22 -- 1 file changed, 8 insertions(+), 14 deletions(-) diff --git a/mm/shmem.c b/mm/shmem.c index c5731bb95

[PATCH v5 17/78] xarray: Add xa_destroy

From: Matthew Wilcox This function frees all the internal memory allocated to the xarray and reinitialises it to be empty. Signed-off-by: Matthew Wilcox --- include/linux/xarray.h | 1 + lib/xarray.c | 25 + 2 files changed, 26 insertions(+) diff --git a/inc

[PATCH v5 33/78] mm: Convert truncate to XArray

From: Matthew Wilcox This is essentially xa_cmpxchg() with the locking handled above us, and it doesn't have to handle replacing a NULL entry. Signed-off-by: Matthew Wilcox --- mm/truncate.c | 15 ++- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/mm/truncate.c b/mm/

[PATCH v5 63/78] dax: Convert dax_insert_pfn_mkwrite to XArray

From: Matthew Wilcox Signed-off-by: Matthew Wilcox --- fs/dax.c | 8 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index d6dd779e1b46..9cfd4fcc0b0d 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -1498,21 +1498,21 @@ static int dax_insert_pfn_mkwrite(struct

[PATCH v5 39/78] mm: Convert collapse_shmem to XArray

From: Matthew Wilcox I found another victim of the radix tree being hard to use. Because there was no call to radix_tree_preload(), khugepaged was allocating radix_tree_nodes using GFP_ATOMIC. I also converted a local_irq_save()/restore() pair to disable()/enable(). Signed-off-by: Matthew Wilc

[PATCH v5 77/78] irqdomain: Convert to XArray

From: Matthew Wilcox In a non-critical path, irqdomain wants to know how many entries are stored in the xarray, so add xa_count(). This is a pretty straightforward conversion; mostly just removing now-redundant locking. The only thing of note is just how much simpler irq_domain_fix_revmap() bec

[PATCH v5 06/78] xarray: Change definition of sibling entries

From: Matthew Wilcox Instead of storing a pointer to the slot containing the canonical entry, store the offset of the slot. Produces slightly more efficient code (~300 bytes) and simplifies the implementation. Signed-off-by: Matthew Wilcox --- include/linux/xarray.h | 82 +

[PATCH v5 60/78] dax: More XArray conversion

From: Matthew Wilcox This time, we want to convert get_unlocked_mapping_entry() to use the XArray. That has a ripple effect, causing us to change the waitqueues to hash on the address of the xarray rather than the address of the mapping (functionally equivalent), and create a lot of on-the-stack

[PATCH v5 44/78] shmem: Convert find_swap_entry to XArray

From: Matthew Wilcox This is a 1:1 conversion. Signed-off-by: Matthew Wilcox --- mm/shmem.c | 23 +++ 1 file changed, 11 insertions(+), 12 deletions(-) diff --git a/mm/shmem.c b/mm/shmem.c index 654f367aca90..ce285ae635ea 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1076,2

[PATCH v5 51/78] shmem: Comment fixups

From: Matthew Wilcox Remove the last mentions of radix tree from various comments. Signed-off-by: Matthew Wilcox --- mm/shmem.c | 14 +++--- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/mm/shmem.c b/mm/shmem.c index ecf05645509b..3cfc247e4796 100644 --- a/mm/shmem.c ++

[PATCH v5 30/78] page cache: Remove stray radix comment

From: Matthew Wilcox Signed-off-by: Matthew Wilcox --- mm/filemap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/filemap.c b/mm/filemap.c index 92ddee25f19b..75d1b32080a4 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -2603,7 +2603,7 @@ static struct page *do_read_cac

[PATCH v5 25/78] page cache: Add page_cache_range_empty function

From: Matthew Wilcox btrfs has its own custom function for determining whether the page cache has any pages in a particular range. Move this functionality to the page cache, and call it from btrfs. Signed-off-by: Matthew Wilcox --- fs/btrfs/btrfs_inode.h | 7 - fs/btrfs/inode.c|

[PATCH v5 14/78] xarray: Add xa_for_each

From: Matthew Wilcox This iterator allows the user to efficiently walk a range of the array, executing the loop body once for each non-NULL entry in that range. This commit also includes xa_find() and xa_next() which are helper functions for xa_for_each() but may also be useful in their own right

[PATCH v5 74/78] xfs: Convert mru cache to XArray

From: Matthew Wilcox This eliminates a call to radix_tree_preload(). Signed-off-by: Matthew Wilcox --- fs/xfs/xfs_mru_cache.c | 72 +++--- 1 file changed, 33 insertions(+), 39 deletions(-) diff --git a/fs/xfs/xfs_mru_cache.c b/fs/xfs/xfs_mru_cache.c

[PATCH v5 18/78] xarray: Add xas_next and xas_prev

From: Matthew Wilcox These two functions move the xas index by one position, and adjust the rest of the iterator state to match it. This is more efficient than calling xas_set() as it keeps the iterator at the leaves of the tree instead of walking the iterator from the root each time. Signed-of

[PATCH v5 67/78] page cache: Finish XArray conversion

From: Matthew Wilcox With no more radix tree API users left, we can drop the GFP flags and use xa_init() instead of INIT_RADIX_TREE(). Signed-off-by: Matthew Wilcox --- fs/inode.c | 2 +- include/linux/fs.h | 2 +- mm/swap_state.c| 2 +- 3 files changed, 3 insertions(+), 3 deletion

[PATCH v5 20/78] xarray: Add MAINTAINERS entry

From: Matthew Wilcox Add myself as XArray and IDR maintainer. Signed-off-by: Matthew Wilcox --- MAINTAINERS | 12 1 file changed, 12 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 82ad0eabce4f..bb5ffa12cf8c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14894,6 +14894

[PATCH v5 41/78] pagevec: Use xa_tag_t

From: Matthew Wilcox Removes sparse warnings. Signed-off-by: Matthew Wilcox --- fs/btrfs/extent_io.c| 4 ++-- fs/ext4/inode.c | 2 +- fs/f2fs/data.c | 2 +- fs/gfs2/aops.c | 2 +- include/linux/pagevec.h | 8 +--- mm/swap.c | 4 ++-- 6 files chan

[PATCH v5 27/78] page cache: Convert page deletion to XArray

From: Matthew Wilcox The code is slightly shorter and simpler. Signed-off-by: Matthew Wilcox --- mm/filemap.c | 26 -- 1 file changed, 12 insertions(+), 14 deletions(-) diff --git a/mm/filemap.c b/mm/filemap.c index 91df92f5c96d..c9bc0dee0154 100644 --- a/mm/filemap.c

[PATCH v5 34/78] mm: Convert add_to_swap_cache to XArray

From: Matthew Wilcox Combine __add_to_swap_cache and add_to_swap_cache into one function since there is no more need to preload. Signed-off-by: Matthew Wilcox --- mm/swap_state.c | 93 ++--- 1 file changed, 29 insertions(+), 64 deletions(-)

[PATCH v5 49/78] shmem: Convert shmem_free_swap to XArray

From: Matthew Wilcox This is a perfect use for xa_cmpxchg(). Note the use of 0 for GFP flags; we won't be allocating memory. Signed-off-by: Matthew Wilcox --- mm/shmem.c | 7 ++- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/mm/shmem.c b/mm/shmem.c index bd66bbd40499..dd66

[PATCH v5 59/78] dax: Convert lock_slot to XArray

From: Matthew Wilcox Signed-off-by: Matthew Wilcox --- fs/dax.c | 22 -- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index dd4674ce48f5..46a4d83b1b46 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -188,12 +188,11 @@ static void dax_wake_mappi

[PATCH v5 31/78] mm: Convert page-writeback to XArray

From: Matthew Wilcox Includes moving mapping_tagged() to fs.h as a static inline, and changing it to return bool. Signed-off-by: Matthew Wilcox --- include/linux/fs.h | 17 +-- mm/page-writeback.c | 62 +++-- 2 files changed, 32 inse

[PATCH v5 45/78] shmem: Convert shmem_tag_pins to XArray

From: Matthew Wilcox Simplify the locking by taking the spinlock while we walk the tree on the assumption that many acquires and releases of the lock will be worse than holding the lock for a (potentially) long time. We could replicate the same locking behaviour with the xarray, but would have t

[PATCH v5 55/78] nilfs2: Convert to XArray

From: Matthew Wilcox I'm not 100% convinced that the rewrite of nilfs_copy_back_pages is correct, but it will at least have different bugs from the current version. Signed-off-by: Matthew Wilcox --- fs/nilfs2/btnode.c | 37 +++- fs/nilfs2/page.c | 72 +

[PATCH v5 62/78] dax: Convert dax_writeback_one to XArray

From: Matthew Wilcox Likewise easy Signed-off-by: Matthew Wilcox --- fs/dax.c | 17 +++-- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index d3894c15609a..d6dd779e1b46 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -633,8 +633,7 @@ static int dax_writ

[PATCH v5 00/78] XArray v5

From: Matthew Wilcox Again, this patch set does not apply to any particular tree because it depends on things which are purely noise, and I'm trying to keep the patch count down [1]. If you want it in a git tree, try http://git.infradead.org/users/willy/linux-dax.git/shortlog/refs/heads/xarray-2

Re: [PATCH 1/2] dt-bindings: usb-xhci: add usb3-resume-missing-cas property

On Tue, Dec 12, 2017 at 11:57:17AM +0800, Li Jun wrote: > Adding 'usb3-resume-missing-cas' property to enable XHCI_MISSING_CAS > quirk flag in case there is CAS missing if device plugged in S3. > > Signed-off-by: Li Jun > --- > Documentation/devicetree/bindings/usb/usb-xhci.txt | 2 ++ > 1 file

[PATCH v5 75/78] usb: Convert xhci-mem to XArray

From: Matthew Wilcox The XArray API is a slightly better fit for xhci_insert_segment_mapping() than the radix tree API was. Signed-off-by: Matthew Wilcox --- drivers/usb/host/xhci-mem.c | 68 +++-- drivers/usb/host/xhci.h | 6 ++-- 2 files changed,

[PATCH v5 29/78] page cache: Convert delete_batch to XArray

From: Matthew Wilcox Rename the function from page_cache_tree_delete_batch to just page_cache_delete_batch. Signed-off-by: Matthew Wilcox --- mm/filemap.c | 23 +-- 1 file changed, 9 insertions(+), 14 deletions(-) diff --git a/mm/filemap.c b/mm/filemap.c index 94496567d2c2

[PATCH v5 02/78] fscache: Use appropriate radix tree accessors

From: Matthew Wilcox Don't open-code accesses to data structure internals. Signed-off-by: Matthew Wilcox --- fs/fscache/cookie.c | 2 +- fs/fscache/object.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c index ff84258132bb..e905

[PATCH v5 47/78] shmem: Convert shmem_add_to_page_cache to XArray

From: Matthew Wilcox This removes the last caller of radix_tree_maybe_preload_order(). Simpler code, unless we run out of memory for new xa_nodes partway through inserting entries into the xarray. Hopefully we can support multi-index entries in the page cache soon and all the awful code goes awa

[PATCH v5 58/78] dax: Convert dax_unlock_mapping_entry to XArray

From: Matthew Wilcox Replace slot_locked() with dax_locked() and inline unlock_slot() into its only caller. Signed-off-by: Matthew Wilcox --- fs/dax.c | 48 1 file changed, 16 insertions(+), 32 deletions(-) diff --git a/fs/dax.c b/fs/dax.c inde

[PATCH v5 64/78] dax: Convert dax_insert_mapping_entry to XArray

From: Matthew Wilcox Signed-off-by: Matthew Wilcox --- fs/dax.c | 18 ++ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index 9cfd4fcc0b0d..a3e795ad2493 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -498,9 +498,9 @@ static void *dax_insert_mapping_e

[PATCH v5 35/78] mm: Convert delete_from_swap_cache to XArray

From: Matthew Wilcox Both callers of __delete_from_swap_cache have the swp_entry_t already, so pass that in to make constructing the XA_STATE easier. Signed-off-by: Matthew Wilcox --- include/linux/swap.h | 5 +++-- mm/swap_state.c | 24 ++-- mm/vmscan.c | 2

[PATCH v5 54/78] fs: Convert writeback to XArray

From: Matthew Wilcox A couple of short loops. Signed-off-by: Matthew Wilcox --- fs/fs-writeback.c | 25 + 1 file changed, 9 insertions(+), 16 deletions(-) diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index e2c1ca667d9a..897a89489fe9 100644 --- a/fs/fs-writeback.c

[PATCH v5 32/78] mm: Convert workingset to XArray

From: Matthew Wilcox We construct a fake XA_STATE and use it to delete the node with xa_store() rather than adding a special function for this unique use case. Signed-off-by: Matthew Wilcox --- include/linux/swap.h | 4 ++-- mm/workingset.c | 49 +-

[PATCH v5 56/78] f2fs: Convert to XArray

From: Matthew Wilcox This is a straightforward conversion. Signed-off-by: Matthew Wilcox --- fs/f2fs/data.c | 3 +-- fs/f2fs/dir.c| 5 + fs/f2fs/inline.c | 6 +- fs/f2fs/node.c | 10 ++ 4 files changed, 5 insertions(+), 19 deletions(-) diff --git a/fs/f2fs/data.c b/

[PATCH v5 08/78] xarray: Define struct xa_node

From: Matthew Wilcox This is a direct replacement for struct radix_tree_node. A couple of struct members have changed name, so convert those. Use a #define so that radix tree users continue to work without change. Signed-off-by: Matthew Wilcox --- include/linux/radix-tree.h| 29 +

[PATCH v5 01/78] xfs: Rename xa_ elements to ail_

From: Matthew Wilcox This is a simple rename, except that xa_ail becomes ail_head. Signed-off-by: Matthew Wilcox --- fs/xfs/xfs_buf_item.c| 10 ++-- fs/xfs/xfs_dquot.c | 4 +- fs/xfs/xfs_dquot_item.c | 11 ++-- fs/xfs/xfs_inode_item.c | 22 +++ fs/xfs/xfs_log.c |

[PATCH v5 07/78] xarray: Add definition of struct xarray

From: Matthew Wilcox This is a direct replacement for struct radix_tree_root. Some of the struct members have changed name; convert those, and use a #define so that radix_tree users continue to work without change. Signed-off-by: Matthew Wilcox --- include/linux/radix-tree.h | 3

[PATCH v5 13/78] xarray: Add xa_cmpxchg

From: Matthew Wilcox This works like doing cmpxchg() on an array entry. Code which wants the radix_tree_insert() semantic of not overwriting an existing entry can cmpxchg() with NULL and get the action it wants. Plus, instead of having an error returned, they get the value currently stored in t

[PATCH v5 22/78] idr: Convert to XArray

From: Matthew Wilcox The IDR distinguishes between unallocated entries (read as NULL) and entries where the user has chosen to store NULL. The radix tree was modified to consider NULL entries which had tag 0 _clear_ as being allocated, but it added a lot of complexity. Instead, the XArray has a

[PATCH v5 76/78] md: Convert raid5-cache to XArray

From: Matthew Wilcox This is the first user of the radix tree I've converted which was storing numbers rather than pointers. I'm fairly pleased with how well it came out. There's less boiler-plate involved than there was with the radix tree, so that's a win. It does use the advanced API, and I

[PATCH v5 68/78] mm: Convert cgroup writeback to XArray

From: Matthew Wilcox This is a fairly naive conversion, leaving in place the GFP_ATOMIC allocation. By switching the locking around, we could use GFP_KERNEL and probably simplify the error handling. Signed-off-by: Matthew Wilcox --- include/linux/backing-dev-defs.h | 2 +- include/linux/back

[PATCH v5 24/78] page cache: Convert hole search to XArray

From: Matthew Wilcox The page cache offers the ability to search for a miss in the previous or next N locations. Rather than teach the XArray about the page cache's definition of a miss, use xas_prev() and xas_next() to search the page array. This should be more efficient as it does not have to

[PATCH v5 70/78] brd: Convert to XArray

From: Matthew Wilcox Convert brd_pages from a radix tree to an XArray. Simpler and smaller code; in particular another user of radix_tree_preload is eliminated. Signed-off-by: Matthew Wilcox --- drivers/block/brd.c | 93 - 1 file changed, 28

[PATCH v5 78/78] fscache: Convert to XArray

From: Matthew Wilcox Removes another user of radix_tree_preload(). Signed-off-by: Matthew Wilcox --- fs/fscache/cookie.c | 6 +- fs/fscache/internal.h | 2 +- fs/fscache/object.c | 2 +- fs/fscache/page.c | 152 +--- fs/fscache/

[PATCH v5 26/78] page cache: Add and replace pages using the XArray

From: Matthew Wilcox Use the XArray APIs to add and replace pages in the page cache. This removes two uses of the radix tree preload API and is significantly shorter code. Signed-off-by: Matthew Wilcox --- mm/filemap.c | 143 +-- 1 file

[PATCH v5 09/78] xarray: Add documentation

From: Matthew Wilcox This is documentation on how to use the XArray, not details about its internal implementation. Signed-off-by: Matthew Wilcox --- Documentation/core-api/index.rst | 1 + Documentation/core-api/xarray.rst | 340 ++ 2 files changed, 341

[PATCH v5 11/78] xarray: Add xa_get_tag, xa_set_tag and xa_clear_tag

From: Matthew Wilcox XArray tags are slightly more strongly typed than the radix tree tags, but occupy the same bits. This commit also adds the xas_ family of tag operations, for cases where the caller is already holding the lock, and xa_tagged() to ask whether any array member has a particular

[PATCH v5 36/78] mm: Convert __do_page_cache_readahead to XArray

From: Matthew Wilcox This one is trivial. Signed-off-by: Matthew Wilcox --- mm/readahead.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/mm/readahead.c b/mm/readahead.c index f64b31b3a84a..66bcaffd47f0 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -174,9 +174,7 @

[PATCH v5 12/78] xarray: Add xa_store

From: Matthew Wilcox xa_store() differs from radix_tree_insert() in that it will overwrite an existing element in the array rather than returning an error. This is the behaviour which most users want, and those that want more complex behaviour generally want to use the xas family of routines any

[PATCH v5 16/78] xarray: Add xa_get_entries, xa_get_tagged and xa_get_maybe_tag

From: Matthew Wilcox These functions allow a range of xarray entries to be extracted into a compact normal array. Signed-off-by: Matthew Wilcox --- include/linux/xarray.h | 27 lib/xarray.c | 88 ++ 2 files changed, 115

[PATCH v5 40/78] mm: Convert khugepaged_scan_shmem to XArray

From: Matthew Wilcox Slightly shorter and easier to read code. Signed-off-by: Matthew Wilcox --- mm/khugepaged.c | 17 + 1 file changed, 5 insertions(+), 12 deletions(-) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 9f49d0cd61c2..15f1b2d81a69 100644 --- a/mm/khugepaged.

[PATCH v5 23/78] ida: Convert to XArray

From: Matthew Wilcox Use the xarray infrstructure like we used the radix tree infrastructure. This lets us get rid of idr_get_free() from the radix tree code. Signed-off-by: Matthew Wilcox --- include/linux/idr.h| 8 +- include/linux/radix-tree.h | 4 - lib/idr.c |

[PATCH v5 04/78] page cache: Use xa_lock

From: Matthew Wilcox Remove the address_space ->tree_lock and use the xa_lock newly added to the radix_tree_root. Rename the address_space ->page_tree to ->pages, since we don't really care that it's a tree. Take the opportunity to rearrange the elements of address_space to pack them better on

[PATCH v5 46/78] shmem: Convert shmem_wait_for_pins to XArray

From: Matthew Wilcox As with shmem_tag_pins(), hold the lock around the entire loop instead of acquiring & dropping it for each entry we're going to untag. Signed-off-by: Matthew Wilcox --- mm/shmem.c | 59 --- 1 file changed, 24 insertio

[PATCH v5 61/78] dax: Convert __dax_invalidate_mapping_entry to XArray

From: Matthew Wilcox Simple now that we already have an xa_state! Signed-off-by: Matthew Wilcox --- fs/dax.c | 10 +- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index 2629ffa70575..d3894c15609a 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -413,24 +413,

[PATCH v5 66/78] dax: Fix sparse warning

From: Matthew Wilcox sparse doesn't know that follow_pte_pmd conditionally acquires the ptl, so add an annotation to let it know what's going on. Signed-off-by: Matthew Wilcox --- fs/dax.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/dax.c b/fs/dax.c index f591ab5be590..6ef727af30f0

[PATCH v5 03/78] xarray: Add the xa_lock to the radix_tree_root

From: Matthew Wilcox This results in no change in structure size on 64-bit x86 as it fits in the padding between the gfp_t and the void *. Signed-off-by: Matthew Wilcox --- fs/f2fs/gc.c | 2 +- include/linux/idr.h| 12 ++-- include/linux/radix-tree.h

[PATCH v5 50/78] shmem: Convert shmem_partial_swap_usage to XArray

From: Matthew Wilcox Simpler code because the xarray takes care of things like the limit and dereferencing the slot. Signed-off-by: Matthew Wilcox --- mm/shmem.c | 18 +++--- 1 file changed, 3 insertions(+), 15 deletions(-) diff --git a/mm/shmem.c b/mm/shmem.c index dd663341e01e..

[PATCH v5 10/78] xarray: Add xa_load

From: Matthew Wilcox This first function in the XArray API brings with it a lot of support infrastructure. The advanced API is based around the xa_state which is a more capable version of the radix_tree_iter. As the test-suite demonstrates, it is possible to use the xarray and radix tree APIs o

[PATCH v5 38/78] mm: Convert huge_memory to XArray

From: Matthew Wilcox Quite a straightforward conversion. Signed-off-by: Matthew Wilcox --- mm/huge_memory.c | 19 --- 1 file changed, 8 insertions(+), 11 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 28909c475ee5..5a41b00d86bd 100644 --- a/mm/huge_memory.

[PATCH v5 19/78] xarray: Add xas_create_range

From: Matthew Wilcox This hopefully temporary function is useful for users who have not yet been converted to multi-index entries. Signed-off-by: Matthew Wilcox --- include/linux/xarray.h | 2 ++ lib/xarray.c | 22 ++ 2 files changed, 24 insertions(+) diff --git

[PATCH v5 15/78] xarray: Add xas_for_each_tag

From: Matthew Wilcox This iterator operates across each tagged entry in the specified range. We do not yet have a user for an xa_for_each_tag iterator, but it would be straight-forward to add one if needed. This commit also includes xas_find_tag() and xas_next_tag(). Signed-off-by: Matthew Wilc

[PATCH v5 05/78] xarray: Replace exceptional entries

From: Matthew Wilcox Introduce xarray value entries to replace the radix tree exceptional entry code. This is a slight change in encoding to allow the use of an extra bit (we can now store BITS_PER_LONG - 1 bits in a value entry). It is also a change in emphasis; exceptional entries are intimida

[PATCH v5 43/78] shmem: Convert shmem_confirm_swap to XArray

From: Matthew Wilcox xa_load has its own RCU locking, so we can eliminate it here. Signed-off-by: Matthew Wilcox --- mm/shmem.c | 7 +-- 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/mm/shmem.c b/mm/shmem.c index fad6c9e7402e..654f367aca90 100644 --- a/mm/shmem.c +++ b/mm/sh

[PATCH v5 28/78] page cache: Convert page cache lookups to XArray

From: Matthew Wilcox Introduce page_cache_pin() to factor out the common logic between the various lookup routines: find_get_entry find_get_entries find_get_pages_range find_get_pages_contig find_get_pages_range_tag find_get_entries_tag filemap_map_pages By using the xa_state to control the ite

[PATCH v5 71/78] xfs: Convert m_perag_tree to XArray

From: Matthew Wilcox Getting rid of the m_perag_lock lets us also get rid of the call to radix_tree_preload(). This is a relatively naive conversion; we could improve performance over the radix tree implementation by passing around xa_state pointers instead of indices, possibly at the expense of

[PATCH v5 37/78] mm: Convert page migration to XArray

From: Matthew Wilcox Signed-off-by: Matthew Wilcox --- mm/migrate.c | 41 - 1 file changed, 16 insertions(+), 25 deletions(-) diff --git a/mm/migrate.c b/mm/migrate.c index 75d19904dd9a..7122fec9b075 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -322,7

[PATCH v5 52/78] btrfs: Convert page cache to XArray

From: Matthew Wilcox Signed-off-by: Matthew Wilcox --- fs/btrfs/compression.c | 4 +--- fs/btrfs/extent_io.c | 6 ++ 2 files changed, 3 insertions(+), 7 deletions(-) diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index e687d06cd97c..4174b166e235 100644 --- a/fs/btrfs/compre

[PATCH v5 73/78] xfs: Convert xfs dquot to XArray

From: Matthew Wilcox This is a pretty straight-forward conversion. Signed-off-by: Matthew Wilcox --- fs/xfs/xfs_dquot.c | 38 +- fs/xfs/xfs_qm.c| 32 fs/xfs/xfs_qm.h| 18 +- 3 files changed, 46 inserti

[PATCH v5 65/78] dax: Convert grab_mapping_entry to XArray

From: Matthew Wilcox Signed-off-by: Matthew Wilcox --- fs/dax.c | 98 +--- 1 file changed, 26 insertions(+), 72 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index a3e795ad2493..f591ab5be590 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -44

[PATCH v5 72/78] xfs: Convert pag_ici_root to XArray

From: Matthew Wilcox Rename pag_ici_root to pag_ici_xa and use XArray APIs instead of radix tree APIs. Shorter code, typechecking on tag numbers, better error checking in xfs_reclaim_inode(), and eliminates a call to radix_tree_preload(). Signed-off-by: Matthew Wilcox --- fs/xfs/libxfs/xfs_sb

[PATCH v5 21/78] xarray: Add ability to store errno values

From: Matthew Wilcox While the radix tree offers no ability to store IS_ERR pointers, documenting that the XArray does not led to some concern. Here is a sanctioned way to store errnos in the XArray. I'm concerned that it will confuse people who can't tell the difference between xa_is_err() and

Re: [PATCH 1/7] soc: mediatek: Add USB wakeup driver

On Sat, Dec 09, 2017 at 04:45:30PM +0800, Chunfeng Yun wrote: > This driver is used to support usb wakeup which is controlled by > the glue layer between SSUSB and SPM. Usually the glue layer is put > into a system controller, such as pericfg module, which is > represented by a syscon node in DTS.

Re: [PATCH 0/7] Add USB remote wakeup driver

On Sat, Dec 09, 2017 at 04:45:29PM +0800, Chunfeng Yun wrote: > These patches introduce the SSUSB and SPM glue layer driver which is > used to support usb remote wakeup. Usually the glue layer is put into > a system controller, such as PERICFG module. > The old way to support usb wakeup is

[GIT PULL] USB driver fixes for 4.15-rc4

The following changes since commit 50c4c4e268a2d7a3e58ebb698ac74da0de40ae36: Linux 4.15-rc3 (2017-12-10 17:56:26 -0800) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/ tags/usb-4.15-rc4 for you to fetch changes up to 48a4ff1c7bb5a32d2e3

Re: [PATCH net-next] qmi_wwan: set FLAG_SEND_ZLP to avoid network initiated disconnect

From: Bjørn Mork Date: Thu, 14 Dec 2017 19:55:50 +0100 > It has been reported that the dummy byte we add to avoid > ZLPs can be forwarded by the modem to the PGW/GGSN, and that > some operators will drop the connection if this happens. > > In theory, QMI devices are based on CDC ECM and should a

[PATCH] usbip: prevent leaking socket pointer address in messages

usbip driver is leaking socket pointer address in messages. Remove the messages that aren't useful and print sockfd in the ones that are useful for debugging. Signed-off-by: Shuah Khan --- drivers/usb/usbip/stub_dev.c | 3 +-- drivers/usb/usbip/usbip_common.c | 16 +--- drivers/

Re: [PATCH] usbip: fix usbip bind writing random string after command in match_busid

On 12/15/2017 02:21 AM, Juan Zea wrote: > usbip bind writes commands followed by random string when writing to > match_busid attribute in sysfs, caused by using full variable size > instead of string length. > > Signed-off-by: Juan Zea > --- > tools/usb/usbip/src/utils.c | 9 ++--- > 1 file

Storing errors in the XArray

On Mon, Dec 11, 2017 at 03:10:22PM -0800, Randy Dunlap wrote: > > +The XArray does not support storing :c:func:`IS_ERR` pointers; some > > +conflict with data values and others conflict with entries the XArray > > +uses for its own purposes. If you need to store special values which > > +cannot be

[PATCH] usbip: stub_rx: fix static checker warning on unnecessary checks

Fix the following static checker warnings: The patch c6688ef9f297: "usbip: fix stub_rx: harden CMD_SUBMIT path to handle malicious input" from Dec 7, 2017, leads to the following static checker warning: drivers/usb/usbip/stub_rx.c:346 get_pipe() warn: impossible condition '(pdu->u.cmd_sub

Re: [PATCH v2] usb: usbtest: Add TEST 29, toggle sync, Clear toggle between bulk writes

On Fri, 15 Dec 2017, Mathias Nyman wrote: > Clear Feature Endpoint Halt should reset the data toggle even if the > endpoint isn't halted. Host should manage to clear the host side data > toggle to keep in sync with the device. > > Test by sending a "3 data packet URB" before and after clearing th

Re: [PATCH] usb: usbtest: Add TEST 29, toggle sync, Clear toggle between bulk writes

On Fri, 15 Dec 2017, Felipe Balbi wrote: > > Hi, > > Alan Stern writes: > > On Thu, 14 Dec 2017, Mathias Nyman wrote: > > > >> Clear Feature Endpoint Halt should reset the data toggle even if the > >> endpoint isn't halted. Host should manage to clear the host side data > >> toggle to keep in s

Re: H3 musb endpoints

在 2017-12-16 00:04，Nuno Gonçalves 写道： Dear Icenowy, In ae49ba1 [1] you list endpoints 1 to 4 for H3, but on the datasheet I read: Support High-Speed (HS, 480-Mbps), Full-Speed (FS, 12-Mbps) in device mode Supports bi-directional endpoint0 for Control transfer in device mode Supports up to 8

H3 musb endpoints

Dear Icenowy, In ae49ba1 [1] you list endpoints 1 to 4 for H3, but on the datasheet I read: Support High-Speed (HS, 480-Mbps), Full-Speed (FS, 12-Mbps) in device mode Supports bi-directional endpoint0 for Control transfer in device mode Supports up to 8 User-Configurable Endpoints for Bulk , Isoc

Re: linux-next: Tree for Dec 14 (usb/dwc3)

Hello, On Fri, 15 Dec 2017 10:17:17 +0200, Felipe Balbi wrote: > Randy Dunlap writes: > > On 12/13/2017 11:06 PM, Stephen Rothwell wrote: > >> Hi all, > >> > >> Changes since 20171213: > >> > > > > on i386: > > > > ERROR: "__tracepoint_dwc3_writel" [drivers/usb/dwc3/dwc3.ko] undefined! > >

Scatter Gather Implementation in DWC3

Hi, I want to use scatter gather logic in DWC3. As per code in DWC3 I identified that DWC3 supports scatter-gather implementation. Now, to check the working of scatter-gather I randomly prepared a buffer containing some strings and pass its address to sg list. I am doing the above operation in b

[PATCH v2] usb: usbtest: Add TEST 29, toggle sync, Clear toggle between bulk writes

Clear Feature Endpoint Halt should reset the data toggle even if the endpoint isn't halted. Host should manage to clear the host side data toggle to keep in sync with the device. Test by sending a "3 data packet URB" before and after clearing the halt. this should create a toggle sequence with two

Naming of tag operations in the XArray

On Thu, Dec 14, 2017 at 08:22:14PM -0800, Matthew Wilcox wrote: > On Mon, Dec 11, 2017 at 03:10:22PM -0800, Randy Dunlap wrote: > > > +A freshly-initialised XArray contains a ``NULL`` pointer at every index. > > > +Each non-``NULL`` entry in the array has three bits associated with > > > +it called

[PATCH] USB: serial: option: adding support for YUGA CLM920-NC5

This patch adds support for YUGA CLM920-NC5 PID 0x9625 USB modem to option driver. Signed-off-by: Taiyi Wu Signed-off-by: SZ Lin --- Please refer to following lsusb output: Bus 001 Device 003: ID 05c6:9625 Qualcomm, Inc. Device Descriptor: bLength18 bDescriptorType

[PATCH] usbip: fix usbip bind writing random string after command in match_busid

usbip bind writes commands followed by random string when writing to match_busid attribute in sysfs, caused by using full variable size instead of string length. Signed-off-by: Juan Zea --- tools/usb/usbip/src/utils.c | 9 ++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/t

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