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authorSang-Heon Jeon <ekffu200098@gmail.com>2026-08-24 01:18:14 +0900
committerJulia Lawall <Julia.Lawall@inria.fr>2026-08-23 22:12:11 +0200
commit2bd30b8dc75b823dd7bbef9d7bc68e1fd7ecee5c (patch)
treedcc4da1d99f17541c5590ac63c77da4bf372a4ab /Documentation/ABI/testing/sysfs-devices-online
downloadlinux-stable-2bd30b8dc75b823dd7bbef9d7bc68e1fd7ecee5c.tar.gz
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coccinelle: alloc_cast: drop removed allocatorsgrafted
- pci_alloc_consistent() and pci_zalloc_consistent() were removed by commit 7968778914e5 ("PCI: Remove the deprecated "pci-dma-compat.h" API") - kmem_alloc() was removed by commit f078d4ea8276 ("xfs: convert kmem_alloc() to kmalloc()") - kmem_zalloc() was removed by commit 10634530f7ba ("xfs: convert kmem_zalloc() to kzalloc()") - kmem_zone_alloc() and kmem_zone_zalloc() were removed by commit bae633a4a283 ("xfs: remove xfs_zone_{alloc,zalloc} helpers") So drop them from the rules. No functional change. Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
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+What: /sys/devices/.../online
+Date: April 2013
+Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
+Description:
+ The /sys/devices/.../online attribute is only present for
+ devices whose bus types provide .online() and .offline()
+ callbacks. The number read from it (0 or 1) reflects the value
+ of the device's 'offline' field. If that number is 1 and '0'
+ (or 'n', or 'N') is written to this file, the device bus type's
+ .offline() callback is executed for the device and (if
+ successful) its 'offline' field is updated accordingly. In
+ turn, if that number is 0 and '1' (or 'y', or 'Y') is written to
+ this file, the device bus type's .online() callback is executed
+ for the device and (if successful) its 'offline' field is
+ updated as appropriate.
+
+ After a successful execution of the bus type's .offline()
+ callback the device cannot be used for any purpose until either
+ it is removed (i.e. device_del() is called for it), or its bus
+ type's .online() is executed successfully.