linux/drivers/dca, branch v3.10.10

dca: convert to idr_alloc()

2013-02-28T03:10:15Z

Convert to the much saner new idr interface. Signed-off-by: Tejun Heo Cc: Paul Gortmaker Cc: Maciej Sosnowski Cc: Shannon Nelson Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

dca: check against empty dca_domains list before unregister provider

2013-01-08T06:05:14Z

When providers get blocked unregister_dca_providers() is called ending up with dca_providers and dca_domain lists emptied. Dca should be prevented from trying to unregister any provider if dca_domain list is found empty. Cc: Reported-by: Jiang Liu Tested-by: Gaohuai Han Signed-off-by: Maciej Sosnowski Signed-off-by: Dan Williams

drivers/dca: Add export.h for THIS_MODULE to dca-sysfs.c

2011-10-31T23:31:43Z

Ensure we have access to the THIS_MODLUE macro once we clean up the implicit module.h usage. Signed-off-by: Paul Gortmaker

drivers/dca: Add module.h to dca-core.c

2011-10-31T23:31:43Z

This file really needs the full module.h header file present, but was just getting it implicitly before. Call it out in advance so that we don't get future build failures on this. Signed-off-by: Paul Gortmaker

locking, drivers/dca: Annotate dca_lock as raw

2011-09-13T09:12:12Z

The dca_lock can be taken in atomic context: [ 25.607536] Call Trace: [ 25.607557] [] try_stack_unwind+0x151/0x1a0 [ 25.607566] [] dump_trace+0x92/0x370 [ 25.607573] [] show_trace_log_lvl+0x5c/0x80 [ 25.607578] [] show_trace+0x15/0x20 [ 25.607587] [] dump_stack+0x77/0x8f [ 25.607595] [] __might_sleep+0x11a/0x130 [ 25.607602] [] rt_spin_lock+0x83/0x90 [ 25.607611] [] dca_common_get_tag+0x28/0x80 [dca] [ 25.607622] [] dca3_get_tag+0x18/0x20 [dca] [ 25.607634] [] igb_update_dca+0xb1/0x1d0 [igb] [ 25.607649] [] igb_setup_dca+0x65/0x80 [igb] [ 25.607663] [] igb_probe+0x946/0xe4d [igb] [ 25.607678] [] local_pci_probe+0x17/0x20 [ 25.607686] [] pci_device_probe+0x121/0x130 [ 25.607699] [] driver_probe_device+0xd2/0x2e0 [ 25.607707] [] __driver_attach+0x9b/0xa0 [ 25.607714] [] bus_for_each_dev+0x6b/0xa0 [ 25.607720] [] driver_attach+0x21/0x30 [ 25.607727] [] bus_add_driver+0x1e5/0x350 [ 25.607734] [] driver_register+0x81/0x160 [ 25.607742] [] __pci_register_driver+0x6f/0xf0 [ 25.607752] [] igb_init_module+0x5b/0x5d [igb] [ 25.607769] [] do_one_initcall+0x3d/0x1a0 [ 25.607778] [] sys_init_module+0xe6/0x270 [ 25.607786] [] system_call_fastpath+0x16/0x1b [ 25.607794] [<00007f84d6783f4a>] 0x7f84d6783f4a and thus must not be preempted on -rt. In mainline this change documents the low level nature of the lock - otherwise there's no functional difference. Lockdep and Sparse checking will work as usual. Signed-off-by: Mike Galbraith [ Fixed the domain allocation which was calling kzalloc from the irq disabled section ] Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar

drivers/dca/dca-core.c: use list_move() instead of list_del()/list_add() combination

2011-03-23T00:44:12Z

Signed-off-by: Kirill A. Shutemov Cc: Maciej Sosnowski Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

dca: remove unneeded NULL check

2011-01-13T16:03:09Z

The return here doesn't release the locks or re-enable IRQs. But as Andrew Morton points out, domain is never NULL. list_first_entry() essentially never returns NULL and also we already verified that the list is not empty. Signed-off-by: Dan Carpenter Acked-by: Maciej Sosnowski Cc: David Miller Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

dca: disable dca on IOAT ver.3.0 multiple-IOH platforms

2010-09-18T03:08:21Z

Direct Cache Access is not supported on IOAT ver.3.0 multiple-IOH platforms. This patch blocks registering of dca providers when multiple IOH detected with IOAT ver.3.0. Signed-off-by: Maciej Sosnowski Signed-off-by: David S. Miller

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

dca: module load should not be an error message

2009-09-13T17:27:04Z

The message (if it must exist) should not be an error message. IMHO such messages are useless. Signed-off-by: Stephen Hemminger Signed-off-by: Dan Williams