kernel/linux.git/include/linux/xarray.h, branch v4.20.9

XArray: Add xa_cmpxchg_irq and xa_cmpxchg_bh

2018-12-06T13:26:17+00:00

These convenience wrappers match the other _irq and _bh wrappers we already have. It turns out I'd already open-coded xa_cmpxchg_irq() in the shmem code, so convert that. Signed-off-by: Matthew Wilcox

XArray: Fix Documentation

2018-11-05T21:38:10+00:00

Minor fixes. Signed-off-by: Matthew Wilcox

XArray: Add xa_store_bh() and xa_store_irq()

2018-11-05T21:38:09+00:00

These convenience wrappers disable interrupts while taking the spinlock. A number of drivers would otherwise have to open-code these functions. Signed-off-by: Matthew Wilcox

XArray: Turn xa_erase into an exported function

2018-11-05T21:38:09+00:00

Make xa_erase() take the spinlock and then call __xa_erase(), but make it out of line since it's such a common function. Signed-off-by: Matthew Wilcox

XArray: Unify xa_cmpxchg and __xa_cmpxchg

2018-11-05T21:38:08+00:00

xa_cmpxchg() was one of the largest functions in the xarray implementation. By turning it into a wrapper and having the callers take the lock (like several other functions), we save 160 bytes on a tinyconfig build and reduce the duplication in xarray.c. Signed-off-by: Matthew Wilcox

XArray: Regularise xa_reserve

2018-11-05T21:38:08+00:00

The xa_reserve() function was a little unusual in that it attempted to be callable for all kinds of locking scenarios. Make it look like the other APIs with __xa_reserve, xa_reserve_bh and xa_reserve_irq variants. Signed-off-by: Matthew Wilcox

xarray: Add range store functionality

2018-10-21T14:46:46+00:00

This version of xa_store_range() really only supports load and store. Our only user only needs basic load and store functionality, so there's no need to do the extra work to support marking and overlapping stores correctly yet. Signed-off-by: Matthew Wilcox

xarray: Track free entries in an XArray

2018-10-21T14:46:32+00:00

Add the optional ability to track which entries in an XArray are free and provide xa_alloc() to replace most of the functionality of the IDR. Signed-off-by: Matthew Wilcox

xarray: Add xa_reserve and xa_release

2018-10-21T14:46:00+00:00

This function reserves a slot in the XArray for users which need to acquire multiple locks before storing their entry in the tree and so cannot use a plain xa_store(). Signed-off-by: Matthew Wilcox

xarray: Add xas_create_range

2018-10-21T14:45:59+00:00

This hopefully temporary function is useful for users who have not yet been converted to multi-index entries. Signed-off-by: Matthew Wilcox