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linux/arch/um/kernel
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John Ogness fdd2c1f4e2 um: synchronize kmsg_dumper 
The kmsg_dumper can be called from any context and CPU, possibly
from multiple CPUs simultaneously. Since a static buffer is used
to retrieve the kernel logs, this buffer must be protected against
simultaneous dumping. Skip dumping if another context is already
dumping.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20210303101528.29901-2-john.ogness@linutronix.de
2021-03-08 11:42:37 +01:00
..
skas um: remove process stub VMA 2021-02-12 21:37:38 +01:00
asm-offsets.c
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: remove process stub VMA 2021-02-12 21:37:38 +01:00
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: time-travel: rework interrupt handling in ext mode 2021-02-12 21:24:27 +01:00
kmsg_dump.c um: synchronize kmsg_dumper 2021-03-08 11:42:37 +01:00
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 Revert "um: allocate a guard page to helper threads" 2021-01-26 22:11:38 +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: Support dynamic IRQ allocation 2020-12-13 22:22:08 +01:00
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: add a pseudo RTC 2021-02-12 21:38:52 +01:00
tlb.c um: remove process stub VMA 2021-02-12 21:37:38 +01:00
trap.c mm: clean up the last pieces of page fault accountings 2020-08-12 10:58:04 -07:00
um_arch.c um: remove process stub VMA 2021-02-12 21:37:38 +01:00
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