spending too much time with his
The 2.6.36 merge window got off to a rather slow start; Linus, perhaps, has
and not enough at the keyboard. Things got rolling,
though, on the afternoon of August 4; as of this writing, about 2600
patches have been merged into the mainline. Here is a summary of what has
been seen so far.
User-visible changes include:
- The 9p filesystem has gained support for extended attributes and
a new, Linux-specific variant of the 9p2000 protocol called 9p2000.L.
- The CIFS filesystem can now make use of FS-Cache to keep local
copies of files for performance.
- The TOMOYO Linux security module has a new "interactive enforcing
mode," allowing an administrator to permit policy violations at run
time. It is intended to help when installing application updates
(which require policy changes) on running production systems.
- At long last, the AppArmor security module has been merged.
- Rafael Wysocki's wakeup_count mechanism has
been merged. This feature is intended to make it possible to suspend
the system without having to worry about races with wakeup events; it
thus hopes to solve part of the problem addressed by suspend blockers.
- Support for the LIRC infrared controller API has been merged, along
with a long list of LIRC drivers. LIRC is one of the larger pieces of
out-of-tree code which is still shipped by many distributors, so this
merge should help bring distributor kernels that much closer to the
- New drivers:
- Boards and systems:
Bluewater Systems Snapper 9260/9G20 modules,
HP t5325 thin client systems,
NXP Semiconductor LPC32xx-based systems, and
Eukrea CPUIMX51 and CPUIMX35 modules.
Atmel QT602240 I2C touchscreens,
Analog Devices ADXL34x three-axis digital accelerometers, and
Cypress cy8ctmg110 touchscreens.
- Miscellaneous: ARM Ltd. character LCD displays,
HTC "Dream" (G1 handset) GPIO lines, and
Intel "intelligent power sharing" controllers.
Freescale Flexcan CAN controllers,
ESD USB/2 CAN/USB interfaces,
Chelsio T4-based gigabit and 10Gb Ethernet
adapters with PCI-E SR-IOV virtual functions, and
CAIF protocol drivers on slave SPI interfaces
i.MX27/i.MX25 camera sensor interfaces,
SunPlus SPCA1528-based USB cameras,
SQ Technologies SQ930X-based USB cameras,
Windows Media Center Edition eHome infrared transceivers, and
Freescale VIU video engines.
Changes visible to kernel developers include:
- The ARM architecture has lost support for the "discontigmem"
memory model; it is expected that everybody is using sparsemem at this
point. ARM has also switched from the old bootmem allocator to
memblock (formerly LMB) and added support for the -fstack-protector
- The DMAPI hooks have been dropped from the XFS filesystem, indicating
that the XFS developers do not ever expect to get hierarchical storage
management at this level merged.
- The PM_QOS API has changed again; quality-of-service requests are now
void pm_qos_add_request(struct pm_qos_request_list *request,
int pm_qos_class, s32 value);
The biggest change is that the request structure must now
be allocated by the caller; this shifts a bit of work but,
importantly, allows this function to be called in atomic context.
The merge window can be expected to remain open until around
August 15, unless Linus decides to surprise developers by making it
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