- 09 Mar, 2017 5 commits
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Michal Hocko authored
Lowmemory killer is sitting in the staging tree since 2008 without any serious interest for fixing issues brought up by the MM folks. The main objection is that the implementation is basically broken by design: - it hooks into slab shrinker API which is not suitable for this purpose. lowmem_count implementation just shows this nicely. There is no scaling based on the memory pressure and no feedback to the generic shrinker infrastructure. Moreover lowmem_scan is called way too often for the heavy work it performs. - it is not reclaim context aware - no NUMA and/or memcg awareness. As the code stands right now it just adds a maintenance overhead when core MM changes have to update lowmemorykiller.c as well. It also seems that the alternative LMK implementation will be solely in the userspace so this code has no perspective it seems. The staging tree is supposed to be for a code which needs to be put in shape before it can be merged which is not the case here obviously. Signed-off-by:
Michal Hocko <mhocko@suse.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Michael Zoran authored
vc04_services has an ioctl interface to dump arbitrary memory to a custom debug log. This is typically only needed by diagnostic tools, and can potentially be a security issue if the devtmpfs node doesn't have adequate permissions set. Since the ability to dump memory still has debugging value, create a new build configuration and disable the feature by default. Signed-off-by:
Michael Zoran <mzoran@crowfest.net> Signed-off-by:
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Michael Zoran authored
This patch adds compatibility wrappers for the ioctls exposed by vchiq/vc04_services. The compat ioctls are completely implemented on top of the native ioctls. No existing lines are modified. While the ideal approach would be to cleanup the existing code, this path is simplier and easier to review. While it does have a small runtime performance penality vs seperating the existing code into wrapper+worker functions, the penality is small since only the metadata is copied back onto the 32 bit user mode stack. The on top of approach is the approach used by several existing performance critical subsystems of Linux such as the DRM 3D graphics subsystem. Testing: 1. A 32 bit chroot was created on a RPI 3 and vchiq_test was built for armhf. The usual tests were run such as vchiq_test -f 10 and vchiq_test -p. 2. This patch was copied onto the shipping version of the Linux kernel used for the RPI and that kernel was built for arm64. That kernel was used to boot Raspbian. Many of the builtin features are now functional such as the "hello_pi" examples, and minecraft_pi. Signed-off-by:
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Michael Zoran authored
The camera driver passes messages back and forth between the firmware with requests and replies. One of the fields of the message header called context is a pointer so the size changes between 32 bit and 64 bit. The context field is used to pair reply messages from the firmware with request messages from the kernel. The simple solution would be to use the padding field for the upper 32 bits of pointers, but this would rely on the firmware always copying the pad field. So instead handles are generated that are 32 bit numbers and a mapping stored in a btree as implemented by the btree library in the kernel lib directory. The mapping pairs the handle with the pointer to the actual data. The btree library was chosen since it's very easy to use and red black trees would be overkill. The camera driver also now forces in the btree library if the camera is included in the build. The btree library is a hidden configuration option. Signed-off-by:
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Michael Zoran authored
The camera driver passes messages back and forth between the firmware with requests and replies. One of the fields of the message header called control_service is a pointer so the size changes between 32 bit and 64 bit. Luckly, the field is not interperated by the driver, so it can be changed to a u32 which has a fixed size. Signed-off-by:
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- 08 Mar, 2017 7 commits
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Alan Cox authored
Signed-off-by:
Alan Cox <alan@linux.intel.com> Signed-off-by:
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Alan Cox authored
Signed-off-by:
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Alan Cox authored
This cuts it back to what is basically a few wrapper functions. At some point we can kill most of these too by changing the callers. Signed-off-by:
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Alan Cox authored
Remove the content that is guarded by this define Signed-off-by:
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Alan Cox authored
Signed-off-by:
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Alan Cox authored
Once we are a bit more sure of their obsolescence they will be deleted Signed-off-by:
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Michael Zoran authored
The camera code has an explicit cache flush operation which is not portable. Now that vc04_services is using portable DMA APIs that already do the cache flushing, explicit flushes should no longer be needed. The one call to __cpuc_flush_dcache_area has been removed. Testing: The offical V2 camera for the RPI was tested on a RPI 3 running in 32 bit mode(armhf). The cheese application and ffmpeg was used to view and stream video from the camera. Nothing new seems to be broken without the cache flushing. Signed-off-by:
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- 07 Mar, 2017 20 commits
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Andrea Ghittino authored
Sparse generates two warnings related to incorrect type in assignment. This patch changes the types in the struct defined in unisys Signed-off-by:
Andrea Ghittino <aghittino@gmail.com> Acked-by:
David Kershner <david.kershner@unisys.com> Signed-off-by:
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simran singhal authored
This patch replace "the the " with "the". The replacement couldn't be automated because sometimes the first "the" was meant to be another word. Signed-off-by:
simran singhal <singhalsimran0@gmail.com> Acked-by:
Julia Lawall <julia.lawall@lip6.fr> Signed-off-by:
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simran singhal authored
This patch replace "the the " with "the". The replacement couldn't be automated because sometimes the first "the" was meant to be another word. Signed-off-by:
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simran singhal authored
This patch replace "the the " with "the". The replacement couldn't be automated because sometimes the first "the" was meant to be another word. Signed-off-by:
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Derek Robson authored
Changed permissions to octal style Found using checkpatch Signed-off-by:
Derek Robson <robsonde@gmail.com> Signed-off-by:
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Aishwarya Pant authored
This patch removes unused semaphores alsa_stream->buffers_update_sem and alsa_stream->control_sem from struct bcm2835_alsa_stream Signed-off-by:
Aishwarya Pant <aishpant@gmail.com> Signed-off-by:
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Narcisa Ana Maria Vasile authored
Use macro min_t to get the minimum of two values for readability. Signed-off-by:
Narcisa Ana Maria Vasile <narcisaanamaria12@gmail.com> Signed-off-by:
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simran singhal authored
This patch replace "is is " with "is". The replacement couldn't be automated because sometimes the first "is" was meant to be another word. Signed-off-by:
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simran singhal authored
This patch replace "is is " with "is". The replacement couldn't be automated because sometimes the first "is" was meant to be another word. Signed-off-by:
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Gargi Sharma authored
The structures and the macros in the header file are not used anywhere inside the kernel (verified by using grep). The structures and macros were leftover from the patch 341f1f0a "staging: lustre: remove remote client support". Also, removed the include statements for lustre_eacl.h. Signed-off-by:
Gargi Sharma <gs051095@gmail.com> Reviewed-by:
Andreas Dilger <andreas.dilger@intel.com> Reviewed-by:
James Simmons <jsimmons@infradead.org> Signed-off-by:
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Gargi Sharma authored
The structure is used as an argument to module_param macro. This macro calls a bunch of other macros and finally assigns the instance of the kernel_param_ops structure to the const struct kernel_param_ops* field of a variable of type kernel_param. Hence, const can be added to the structure. Coccinelle Script: @r disable optional_qualifier@ identifier i; position p; @@ static struct kernel_param_ops i@p = { ... }; @ok1@ identifier r.i; expression e; position p; @@ e = i@p @script:python s@ i << r.i; t; @@ coccinelle.t = i[10:]; @ok2@ declarer name module_param; expression e1,e2; position p; @@ module_param(e1,s.t@p,e2); @bad@ position p != {r.p,ok1.p,ok2.p}; identifier r.i; @@ e@i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct kernel_param_ops i = { ... }; Signed-off-by: -
Mario Bambagini authored
fixed the following sparse warning by adding proper cast: drivers/staging//lustre/lustre/obdclass/obd_config.c:1055:74: warning: incorrect type in argument 2 (different address spaces) drivers/staging//lustre/lustre/obdclass/obd_config.c:1055:74: expected char const [noderef] <asn:1>*<noident> drivers/staging//lustre/lustre/obdclass/obd_config.c:1055:74: got char *[assigned] sval Signed-off-by:
Mario Bambagini <mario.bambagini@gmail.com> Acked-by:
Oleg Drokin <oleg.drokin@intel.com> Signed-off-by:
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Greg Kroah-Hartman authored
Using LINUXINCLUDE is a very old hack, and doesn't play well with building objects in a different directory than the kernel source is in. So fix up the include file references to be relative to make it obvious we are pulling in local include files, which need to get fixed up. Reported-by:
kbuild test robot <fengguang.wu@intel.com> Reported-by:
Stephen Rothwell <sfr@canb.auug.org.au> Cc: Alan Cox <alan@linux.intel.com> Signed-off-by:
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simran singhal authored
This patch replace "is is " with "is". The replacement couldn't be automated because sometimes the first "is" was meant to be another word. Signed-off-by:
Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by:
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Jonathan Bowie authored
Fixed incosistent spacing around arithmetic operator. Signed-off-by:
Jonathan Bowie <eudjtb@gmail.com> Reviewed-by:
Johan Hovold <johan@kernel.org> Acked-by:
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Aishwarya Pant authored
udelay is impelmented using a busy-wait loop and consumes CPU cycles while usleep_range is implemented using interrupts.cls_flush_uart_write() is called after a channel lock is acquired i.e. an atomic context. Hence delay in this method should use udelay instead of usleep_range. Signed-off-by:
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Gargi Sharma authored
The ktermios structure is a local default termios struct. All ports are initially created with this termios. Since, the structure is never modified, it can be declared as const. Coccinelle Script: @r disable optional_qualifier@ identifier s,i; position p; @@ static struct ktermios i@p = { ... }; @ok1@ identifier r.i; expression e; position p; @@ e = i@p @bad@ position p != {r.p,ok1.p}; identifier r.i; @@ e@i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct ktermios i = { ... }; File Size before: text data bss dec hex filename 25469 2048 256 27773 6c7d drivers/staging/dgnc/dgnc_tty.o File Size after: text data bss dec hex filename 25636 2016 256 27908 6d04 drivers/staging/dgnc/dgnc_tty.o Signed-off-by: -
Arushi Singhal authored
This patch fixes the checkpatch issue: CHECK: Logical continuations should be on the previous line. Signed-off-by:
Arushi Singhal <arushisinghal19971997@gmail.com> Signed-off-by:
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Arushi Singhal authored
function prototype argument should have an identifier name as reported by checkpatch.pl. Signed-off-by:
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Arushi Singhal authored
Fix checkpatch issues: "CHECK: Alignment should match open parenthesis". Signed-off-by:
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- 06 Mar, 2017 8 commits
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Aishwarya Pant authored
use min_t() macro in place of min() to replace the two typecasts of min. Change suggested by checkpatch script. Signed-off-by:
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Aishwarya Pant authored
Fix the following checkpatch warning issued on bcm2835-vchiq.c: CHECK: Alignment should match open parenthesis Signed-off-by:
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Aishwarya Pant authored
fix typo in word receives Signed-off-by:
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Aishwarya Pant authored
Add braces on all arms of the if-else statements in bcm2835-vchiq.c to comply with kernel coding style. Signed-off-by:
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Aishwarya Pant authored
Remove instances of unnecessary blank space after cast in bcm2835-vchiq.c Signed-off-by:
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Aishwarya Pant authored
Use dev_err(... in place of printk(KERN_ERR ... Problem found by checkpatch Signed-off-by:
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Aishwarya Pant authored
Fix the warning: Blank lines aren't necessary after an open brace '{' issued by checkpatch on bcm2835-ctl.c Signed-off-by: -
Aishwarya Pant authored
Fix block comment formatting to suppress the following warning thrown by checkpatch: Block comments use a trailing */ on a separate line Signed-off-by:
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