kernel/linux.git/arch/arm/vfp, branch linux-4.16.y

ARM: fix kill( ,SIGFPE) breakage

2018-06-20T19:01:47+00:00

[ Upstream commit 92d44a42af81e850a038c38278ff4f434b2871df ] Commit 7771c6645700 ("signal/arm: Document conflicts with SI_USER and SIGFPE") broke the siginfo structure for userspace triggered signals, causing the strace testsuite to regress. Fix this by eliminating the FPE_FIXME definition (which is at the root of the breakage) and use FPE_FLTINV instead for the case where the hardware appears to be reporting nonsense. Fixes: 7771c6645700 ("signal/arm: Document conflicts with SI_USER and SIGFPE") Suggested-by: Linus Torvalds Signed-off-by: Russell King Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

ARM: 8746/1: vfp: Go back to clearing vfp_current_hw_state[]

2018-03-24T14:27:48+00:00

Commit 384b38b66947 ("ARM: 7873/1: vfp: clear vfp_current_hw_state for dying cpu") fixed the cpu dying notifier by clearing vfp_current_hw_state[]. However commit e5b61bafe704 ("arm: Convert VFP hotplug notifiers to state machine") incorrectly used the original vfp_force_reload() function in the cpu dying notifier. Fix it by going back to clearing vfp_current_hw_state[]. Fixes: e5b61bafe704 ("arm: Convert VFP hotplug notifiers to state machine") Cc: linux-stable Reported-by: Kohji Okuno Signed-off-by: Fabio Estevam Signed-off-by: Russell King

signal/arm: Document conflicts with SI_USER and SIGFPE

2018-01-12T20:21:05+00:00

Setting si_code to 0 results in a userspace seeing an si_code of 0. This is the same si_code as SI_USER. Posix and common sense requires that SI_USER not be a signal specific si_code. As such this use of 0 for the si_code is a pretty horribly broken ABI. Further use of si_code == 0 guaranteed that copy_siginfo_to_user saw a value of __SI_KILL and now sees a value of SIL_KILL with the result that uid and pid fields are copied and which might copying the si_addr field by accident but certainly not by design. Making this a very flakey implementation. Utilizing FPE_FIXME, siginfo_layout will now return SIL_FAULT and the appropriate fields will be reliably copied. Possible ABI fixes includee: - Send the signal without siginfo - Don't generate a signal - Possibly assign and use an appropriate si_code - Don't handle cases which can't happen Cc: Russell King Cc: linux-arm-kernel@lists.infradead.org Ref: 451436b7bbb2 ("[ARM] Add support code for ARM hardware vector floating point") History Tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git Signed-off-by: "Eric W. Biederman"

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:29+00:00

We are going to split out of , which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder file that just maps to to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

cpu/hotplug: Cleanup state names

2016-12-25T09:47:44+00:00

When the state names got added a script was used to add the extra argument to the calls. The script basically converted the state constant to a string, but the cleanup to convert these strings into meaningful ones did not happen. Replace all the useless strings with 'subsys/xxx/yyy:state' strings which are used in all the other places already. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: Sebastian Siewior Link: http://lkml.kernel.org/r/20161221192112.085444152@linutronix.de Signed-off-by: Thomas Gleixner

ARM: 8629/1: vfp: properly tag assembly function declarations in C code

2016-11-22T11:45:09+00:00

This is good for consistency even if there is no difference in compiled code. LTO might rely on this eventually. No need to preserve the extern attribute as it is the default with function prototypes. Signed-off-by: Nicolas Pitre Signed-off-by: Russell King

arm: Convert VFP hotplug notifiers to state machine

2016-07-15T08:40:22+00:00

Straight forward conversion plus commentary why code which is executed in hotplug callbacks needs to be invoked before installing them. Signed-off-by: Thomas Gleixner Signed-off-by: Anna-Maria Gleixner Reviewed-by: Sebastian Andrzej Siewior Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Russell King Cc: linux-arm-kernel@lists.infradead.org Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20160713153335.713612993@linutronix.de Signed-off-by: Ingo Molnar

exit_thread: accept a task parameter to be exited

2016-05-21T00:58:30+00:00

We need to call exit_thread from copy_process in a fail path. So make it accept task_struct as a parameter. [v2] * s390: exit_thread_runtime_instr doesn't make sense to be called for non-current tasks. * arm: fix the comment in vfp_thread_copy * change 'me' to 'tsk' for task_struct * now we can change only archs that actually have exit_thread [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Jiri Slaby Cc: "David S. Miller" Cc: "H. Peter Anvin" Cc: "James E.J. Bottomley" Cc: Aurelien Jacquiot Cc: Benjamin Herrenschmidt Cc: Catalin Marinas Cc: Chen Liqin Cc: Chris Metcalf Cc: Chris Zankel Cc: David Howells Cc: Fenghua Yu Cc: Geert Uytterhoeven Cc: Guan Xuetao Cc: Haavard Skinnemoen Cc: Hans-Christian Egtvedt Cc: Heiko Carstens Cc: Helge Deller Cc: Ingo Molnar Cc: Ivan Kokshaysky Cc: James Hogan Cc: Jeff Dike Cc: Jesper Nilsson Cc: Jiri Slaby Cc: Jonas Bonn Cc: Koichi Yasutake Cc: Lennox Wu Cc: Ley Foon Tan Cc: Mark Salter Cc: Martin Schwidefsky Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Mikael Starvik Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Ralf Baechle Cc: Rich Felker Cc: Richard Henderson Cc: Richard Kuo Cc: Richard Weinberger Cc: Russell King Cc: Steven Miao Cc: Thomas Gleixner Cc: Tony Luck Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ARM: vfp: Add vfp_disable for problematic platforms

2015-05-20T22:07:00+00:00

Some platforms might not be able to fully utilize VFP when e.g: one CPU out of two in a SMP complex lacks a VFP unit. Adding code to migrate task to the CPU which has a VFP unit would be cumbersome and not performant, instead, just add the ability to disable VFP. Signed-off-by: Florian Fainelli

ARM: convert printk(KERN_* to pr_*

2014-11-21T15:24:50+00:00

Convert many (but not all) printk(KERN_* to pr_* to simplify the code. We take the opportunity to join some printk lines together so we don't split the message across several lines, and we also add a few levels to some messages which were previously missing them. Tested-by: Andrew Lunn Tested-by: Felipe Balbi Signed-off-by: Russell King