linux/drivers/misc, branch v2.6.34

VMware Balloon driver

2010-04-24T18:31:26Z

This is a standalone version of VMware Balloon driver. Ballooning is a technique that allows hypervisor dynamically limit the amount of memory available to the guest (with guest cooperation). In the overcommit scenario, when hypervisor set detects that it needs to shuffle some memory, it instructs the driver to allocate certain number of pages, and the underlying memory gets returned to the hypervisor. Later hypervisor may return memory to the guest by reattaching memory to the pageframes and instructing the driver to "deflate" balloon. We are submitting a standalone driver because KVM maintainer (Avi Kivity) expressed opinion (rightly) that our transport does not fit well into virtqueue paradigm and thus it does not make much sense to integrate with virtio. There were also some concerns whether current ballooning technique is the right thing. If there appears a better framework to achieve this we are prepared to evaluate and switch to using it, but in the meantime we'd like to get this driver upstream. We want to get the driver accepted in distributions so that users do not have to deal with an out-of-tree module and many distributions have "upstream first" requirement. The driver has been shipping for a number of years and users running on VMware platform will have it installed as part of VMware Tools even if it will not come from a distribution, thus there should not be additional risk in pulling the driver into mainline. The driver will only activate if host is VMware so everyone else should not be affected at all. Signed-off-by: Dmitry Torokhov Cc: Avi Kivity Cc: Jeremy Fitzhardinge Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'master' into export-slabh

2010-04-05T02:37:28Z

kgdbts,sh: Add in breakpoint pc offset for superh

2010-04-02T19:58:17Z

The kgdb test suite mimics the behavior of gdb. For the sh architecture the pc must be decremented by 2 for software breakpoint. Signed-off-by: Jason Wessel Acked-by: Paul Mundt

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30T13:02:32Z

percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo Guess-its-ok-by: Christoph Lameter Cc: Ingo Molnar Cc: Lee Schermerhorn

c2port: fix device_create() return value check

2010-03-24T23:31:21Z

Use IS_ERR() instead of comparing to NULL. [akpm@linux-foundation.org: preserve the error code] Signed-off-by: Jani Nikula Cc: Vegard Nossum Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

init dynamic bin_attribute structures

2010-03-15T03:28:39Z

Commit 6992f5334995af474c2b58d010d08bc597f0f2fe ("sysfs: Use one lockdep class per sysfs attribute.") introduced this requirement. First, at25 was fixed manually. Then, other occurences were found with coccinelle and the following semantic patch. Results were reviewed and fixed up: @ init @ identifier struct_name, bin; @@ struct struct_name { ... struct bin_attribute bin; ... }; @ main extends init @ expression E; statement S; identifier name, err; @@ ( struct struct_name *name; | - struct struct_name *name = NULL; + struct struct_name *name; ) ... ( sysfs_bin_attr_init(&name->bin); | + sysfs_bin_attr_init(&name->bin); if (sysfs_create_bin_file(E, &name->bin)) S | + sysfs_bin_attr_init(&name->bin); err = sysfs_create_bin_file(E, &name->bin); ) Signed-off-by: Wolfram Sang Cc: Eric W. Biederman Signed-off-by: Linus Torvalds

at24: Init dynamic bin_attribute structures

2010-03-13T19:56:55Z

Commit 6992f5334995af474c2b58d010d08bc597f0f2fe introduced this requirement. Reported-by: Albrecht Dress Signed-off-by: Wolfram Sang Signed-off-by: Eric W. Biederman Signed-off-by: Jean Delvare

tsl2550: Move from i2c/chips to misc

2010-03-13T19:56:54Z

Move the last remaining driver from i2c/chips to misc. Good ridance! Signed-off-by: Jean Delvare Acked-by: Wolfram Sang Acked-by: Jonathan Cameron

sgi-gru: use for_each_set_bit()

2010-03-12T23:52:44Z

Replace open-coded loop with for_each_set_bit(). Signed-off-by: Akinobu Mita Cc: Jack Steiner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

driver core: Convert some drivers to CLASS_ATTR_STRING

2010-03-08T01:04:48Z

Convert some drivers who export a single string as class attribute to the new class_attr_string functions. This removes redundant code all over. Signed-off-by: Andi Kleen Signed-off-by: Greg Kroah-Hartman