linux/arch/um/kernel
Peter Zijlstra 58c644ba51 sched/idle: Fix arch_cpu_idle() vs tracing
We call arch_cpu_idle() with RCU disabled, but then use
local_irq_{en,dis}able(), which invokes tracing, which relies on RCU.

Switch all arch_cpu_idle() implementations to use
raw_local_irq_{en,dis}able() and carefully manage the
lockdep,rcu,tracing state like we do in entry.

(XXX: we really should change arch_cpu_idle() to not return with
interrupts enabled)

Reported-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lkml.kernel.org/r/20201120114925.594122626@infradead.org
2020-11-24 16:47:35 +01:00
..
skas arch/um: partially revert the conversion to __section() macro 2020-10-26 15:39:37 -07:00
asm-offsets.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
config.c.in um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
dyn.lds.S vmlinux.lds.h: Split ELF_DETAILS from STABS_DEBUG 2020-09-01 09:50:35 +02:00
early_printk.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
exec.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
exitcode.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
gmon_syms.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
gprof_syms.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
initrd.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
irq.c um: irq: Fix LAST_IRQ usage in init_IRQ() 2019-09-16 08:38:58 +02:00
kmsg_dump.c um: Don't use console_drivers directly 2020-03-29 23:17:10 +02:00
ksyms.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
maccess.c maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault 2020-06-17 10:57:41 -07:00
Makefile um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
mem.c asm-generic: pgalloc: provide generic pgd_free() 2020-08-07 11:33:26 -07:00
physmem.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
process.c sched/idle: Fix arch_cpu_idle() vs tracing 2020-11-24 16:47:35 +01:00
ptrace.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
reboot.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
sigio.c um: change sigio_spinlock to a mutex 2020-10-11 23:19:35 +02:00
signal.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
stacktrace.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
syscall.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
sysrq.c um: Clean up stacktrace dump 2020-10-11 23:25:07 +02:00
time.c um: time-travel: Return the sequence number in ACK messages 2020-10-11 23:13:27 +02:00
tlb.c mmap locking API: convert mmap_sem comments 2020-06-09 09:39:14 -07:00
trap.c mm: clean up the last pieces of page fault accountings 2020-08-12 10:58:04 -07:00
um_arch.c treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
umid.c um: Add SPDX headers to files in arch/um/kernel/ 2019-09-15 21:37:17 +02:00
uml.lds.S vmlinux.lds.h: Split ELF_DETAILS from STABS_DEBUG 2020-09-01 09:50:35 +02:00
vmlinux.lds.S arm, cris, mips, sparc, powerpc, um, xtensa: fix build with bash 4.0 2009-09-20 12:28:22 +02:00