kernel/drivers/platform/goldfish, branch linux-4.16.y

vfs: do bulk POLL* -> EPOLL* replacement

2018-02-11T22:34:03Z

This is the mindless scripted replacement of kernel use of POLL* variables as described by Al, done by this script: for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'` for f in $L; do sed -i "-es/^$[^\"]*$$\$/\\1E\\2/" $f; done done with de-mangling cleanups yet to come. NOTE! On almost all architectures, the EPOLL* constants have the same values as the POLL* constants do. But they keyword here is "almost". For various bad reasons they aren't the same, and epoll() doesn't actually work quite correctly in some cases due to this on Sparc et al. The next patch from Al will sort out the final differences, and we should be all done. Scripted-by: Al Viro Signed-off-by: Linus Torvalds

the rest of drivers/*: annotate ->poll() instances

2017-11-28T16:06:58Z

Signed-off-by: Al Viro

Merge 4.12-rc5 into char-misc-next

2017-06-12T06:18:10Z

We want the char/misc driver fixes in here as well. Signed-off-by: Greg Kroah-Hartman

goldfish_pipe: use GFP_ATOMIC under spin lock

2017-05-25T16:26:11Z

The function get_free_pipe_id_locked() is called from goldfish_pipe_open() with a lock is held, so we should use GFP_ATOMIC instead of GFP_KERNEL. Signed-off-by: Wei Yongjun Signed-off-by: Greg Kroah-Hartman

goldfish_pipe: make pipe_dev static

2017-05-25T16:24:03Z

Make this static as it's only referenced in this source and it does not need global scope. Cleans up a sparse warning: drivers/platform/goldfish/goldfish_pipe.c: warning: symbol 'pipe_dev' was not declared. Should it be static? Signed-off-by: Colin Ian King Signed-off-by: Greg Kroah-Hartman

goldfish_pipe: fix build warning about using too much stack.

2017-04-26T09:43:39Z

The new goldfish_pipe code used too much stack space in the transfer_max_buffers() call. As the function is serialized with a lock, let's make the buffer static to not use the stack for the large buffer. Reported-by: kbuild test robot Cc: Yurii Zubrytskyi Cc: Jin Qian Signed-off-by: Greg Kroah-Hartman

goldfish_pipe: An implementation of more parallel pipe

2017-04-26T09:43:03Z

This is a driver code for a redesigned android pipe. Currently it works for x86 and x64 emulators with the following performance results: ADB push to /dev/null, Ubuntu, 400 MB file, times are for (1 / 10 / 100) parallel adb commands x86 adb push: (4.4s / 11.5s / 2m10s) -> (2.8s / 6s / 51s) x64 adb push: (7s / 15s / (too long, 6m+) -> (2.7s / 6.2s / 52s) ADB pull and push to /data/ have the same %% of speedup More importantly, I don't see any signs of slowdowns when run in parallel with Antutu benchmark, so it is definitely making much better job at multithreading. Signed-off-by: Yurii Zubrytskyi Signed-off-by: Jin Qian Signed-off-by: Greg Kroah-Hartman

goldfish: Sanitize the broken interrupt handler

2017-02-15T16:49:58Z

This interrupt handler is broken in several ways: - It loops forever when the op code is not decodeable - It never returns IRQ_HANDLED because the only way to exit the loop returns IRQ_NONE unconditionally. The whole concept of this is broken. Creating devices in an interrupt handler is beyond any point of sanity. Make it at least behave halfways sane so accidental users do not have to deal with a hard to debug lockup. Fixes: e809c22b8fb028 ("goldfish: add the goldfish virtual bus") Reported-by: Gabriel C Signed-off-by: Thomas Gleixner Acked-by: Linus Torvalds Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman

platform: goldfish: pipe: use get_user_pages_unlocked()

2016-11-10T14:34:56Z

Moving from get_user_pages() to get_user_pages_unlocked() simplifies the code and takes advantage of VM_FAULT_RETRY functionality when faulting in pages. Signed-off-by: Lorenzo Stoakes Signed-off-by: Greg Kroah-Hartman

mm: replace get_user_pages() write/force parameters with gup_flags

2016-10-19T15:11:43Z

This removes the 'write' and 'force' from get_user_pages() and replaces them with 'gup_flags' to make the use of FOLL_FORCE explicit in callers as use of this flag can result in surprising behaviour (and hence bugs) within the mm subsystem. Signed-off-by: Lorenzo Stoakes Acked-by: Christian König Acked-by: Jesper Nilsson Acked-by: Michal Hocko Reviewed-by: Jan Kara Signed-off-by: Linus Torvalds