user/sven/linux.git/kernel/compat.c, branch v3.8.10

x32: fix sigtimedwait

2012-12-26T06:15:03Z

It needs 64bit timespec. As it is, we end up truncating the timeout to whole seconds; usually it doesn't matter, but for having all sub-second timeouts truncated to one jiffy is visibly wrong. Signed-off-by: Al Viro

x32: fix waitid()

2012-12-26T06:15:03Z

It needs 64bit rusage and 32bit siginfo. glibc never calls it with non-NULL rusage pointer, or we would've seen breakage already... Signed-off-by: Al Viro

switch compat_sys_wait4() and compat_sys_waitid() to COMPAT_SYSCALL_DEFINE

2012-12-26T06:15:02Z

Strictly speaking, ppc64 needs it for C ABI compliance. Realistically I would be very surprised if e.g. passing 0xffffffff as 'options' argument to waitid() from 32bit task would cause problems, but yes, it puts us into undefined behaviour territory. ppc64 expects int argument to be passed in 64bit register with bits 31..63 containing the same value. SYSCALL_DEFINE on ppc provides a wrapper that normalizes the value passed from userland; so does COMPAT_SYSCALL_DEFINE. Plain declaration of compat_sys_something() with an int argument obviously doesn't. Again, for wait4 and waitid I would be extremely surprised if gcc started to produce code depending on that value having been properly sign-extended - the argument(s) in question end up passed blindly to sys_wait4 and sys_waitid resp. and normalization for native syscalls takes care of their use there. Still, better to use COMPAT_SYSCALL_DEFINE here than worry about nasal daemons... Signed-off-by: Al Viro

compat: generic compat_sys_sched_rr_get_interval() implementation

2012-12-18T01:15:18Z

This function is used by sparc, powerpc tile and arm64 for compat support. The patch adds a generic implementation with a wrapper for PowerPC to do the u32->int sign extension. The reason for a single patch covering powerpc, tile, sparc and arm64 is to keep it bisectable, otherwise kernel building may fail with mismatched function declarations. Signed-off-by: Catalin Marinas Acked-by: Chris Metcalf [for tile] Acked-by: David S. Miller Acked-by: Arnd Bergmann Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Alexander Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

new helper: sigsuspend()

2012-05-22T03:52:30Z

guts of saved_sigmask-based sigsuspend/rt_sigsuspend. Takes kernel sigset_t *. Open-coded instances replaced with calling it. Signed-off-by: Al Viro

compat: Fix RT signal mask corruption via sigprocmask

2012-05-10T15:58:33Z

compat_sys_sigprocmask reads a smaller signal mask from userspace than sigprogmask accepts for setting. So the high word of blocked.sig[0] will be cleared, releasing any potentially blocked RT signal. This was discovered via userspace code that relies on get/setcontext. glibc's i386 versions of those functions use sigprogmask instead of rt_sigprogmask to save/restore signal mask and caused RT signal unblocking this way. As suggested by Linus, this replaces the sys_sigprocmask based compat version with one that open-codes the required logic, including the merge of the existing blocked set with the new one provided on SIG_SETMASK. Signed-off-by: Jan Kiszka Signed-off-by: Linus Torvalds

compat: Add helper functions to read/write struct timeval, timespec

2012-02-20T20:48:47Z

Add helper functions to read and write struct timeval and struct timespec from userspace. We already had helper functions for reading and writing struct compat_timespec; add a set of functions to do the same with struct timeval, and add a second suite of functions which can be sensitive to COMPAT_USE_64BIT_TIME and access either 32- or 64-bit time structures. This also exports these helper functions to modules. Rename the existing inlines for converting between struct compat_timeval and native struct timespec so we can have a saner naming convention for the exported functions. Suggested-by: Linus Torvalds Signed-off-by: H. Peter Anvin

kernel: Fix files explicitly needing EXPORT_SYMBOL infrastructure

2011-10-31T23:30:05Z

These files were getting via an implicit non-obvious path, but we want to crush those out of existence since they cost time during compiles of processing thousands of lines of headers for no reason. Give them the lightweight header that just contains the EXPORT_SYMBOL infrastructure. Signed-off-by: Paul Gortmaker

Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6

2011-07-30T07:08:53Z

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (430 commits) [media] ir-mce_kbd-decoder: include module.h for its facilities [media] ov5642: include module.h for its facilities [media] em28xx: Fix DVB-C maxsize for em2884 [media] tda18271c2dd: Fix saw filter configuration for DVB-C @6MHz [media] v4l: mt9v032: Fix Bayer pattern [media] V4L: mt9m111: rewrite set_pixfmt [media] V4L: mt9m111: fix missing return value check mt9m111_reg_clear [media] V4L: initial driver for ov5642 CMOS sensor [media] V4L: sh_mobile_ceu_camera: fix Oops when USERPTR mapping fails [media] V4L: soc-camera: remove soc-camera bus and devices on it [media] V4L: soc-camera: un-export the soc-camera bus [media] V4L: sh_mobile_csi2: switch away from using the soc-camera bus notifier [media] V4L: add media bus configuration subdev operations [media] V4L: soc-camera: group struct field initialisations together [media] V4L: soc-camera: remove now unused soc-camera specific PM hooks [media] V4L: pxa-camera: switch to using standard PM hooks [media] NetUP Dual DVB-T/C CI RF: force card hardware revision by module param [media] Don't OOPS if videobuf_dvb_get_frontend return NULL [media] NetUP Dual DVB-T/C CI RF: load firmware according card revision [media] omap3isp: Support configurable HS/VS polarities ... Fix up conflicts: - arch/arm/mach-omap2/board-rx51-peripherals.c: cleanup regulator supply definitions in mach-omap2 vs OMAP3: RX-51: define vdds_csib regulator supply - drivers/staging/tm6000/tm6000-alsa.c (trivial)

[media] v4l2-compat-ioctl32: add VIDIOC_DQEVENT support

2011-07-27T20:53:20Z

Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab