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OpenCloudOS-Kernel
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OpenCloudOS-Kernel/arch/alpha/kernel
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Josh Poimboeuf 071c44e427 sched/idle: Mark arch_cpu_idle_dead() __noreturn 
Before commit 076cbf5d2163 ("x86/xen: don't let xen_pv_play_dead()
return"), in Xen, when a previously offlined CPU was brought back
online, it unexpectedly resumed execution where it left off in the
middle of the idle loop.

There were some hacks to make that work, but the behavior was surprising
as do_idle() doesn't expect an offlined CPU to return from the dead (in
arch_cpu_idle_dead()).

Now that Xen has been fixed, and the arch-specific implementations of
arch_cpu_idle_dead() also don't return, give it a __noreturn attribute.

This will cause the compiler to complain if an arch-specific
implementation might return.  It also improves code generation for both
caller and callee.

Also fixes the following warning:

  vmlinux.o: warning: objtool: do_idle+0x25f: unreachable instruction

Reported-by: Paul E. McKenney <paulmck@kernel.org>
Tested-by: Paul E. McKenney <paulmck@kernel.org>
Link: https://lore.kernel.org/r/60d527353da8c99d4cf13b6473131d46719ed16d.1676358308.git.jpoimboe@kernel.org
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
 		2023-03-08 08:44:28 -08:00
..
syscalls alpha: remove the needless aliases osf_{readv,writev} 2022-10-11 10:27:39 -07:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
Makefile Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
asm-offsets.c alpha: lazy FPU switching 2023-02-24 23:14:22 -05:00
audit.c audit: add support for the openat2 syscall 2021-10-01 16:52:48 -04:00
bugs.c alpha: Implement CPU vulnerabilities sysfs functions. 2018-04-07 15:04:04 -07:00
console.c vgacon: Set VGA struct resource types 2017-12-18 23:07:43 -06:00
core_apecs.c memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
core_cia.c alpha: fixed a typo in core_cia.c 2023-02-24 23:14:22 -05:00
core_irongate.c memblock: use memblock_free for freeing virtual pointers 2021-11-06 13:30:41 -07:00
core_lca.c memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
core_marvel.c alpha: fix marvel_ioread8 build regression 2022-10-10 10:33:55 +02:00
core_mcpcia.c memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
core_polaris.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
core_t2.c memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
core_titan.c mm: remove unneeded includes of <asm/pgalloc.h> 2020-08-07 11:33:26 -07:00
core_tsunami.c memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
core_wildfire.c alpha: remove DISCONTIGMEM and NUMA 2021-06-29 10:53:55 -07:00
entry.S alpha: lazy FPU switching 2023-02-24 23:14:22 -05:00
err_common.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
err_ev6.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
err_ev7.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
err_impl.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
err_marvel.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
err_titan.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
es1888.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gct.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
head.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
io.c alpha: add full ioread64/iowrite64 implementation 2022-10-04 11:23:29 +02:00
irq.c genirq: Add and use an irq_data_update_affinity helper 2022-07-07 09:38:04 +01:00
irq_alpha.c alpha: Replace setup_irq() by request_irq() 2020-03-29 21:03:41 +02:00
irq_i8259.c alpha: Replace setup_irq() by request_irq() 2020-03-29 21:03:41 +02:00
irq_impl.h alpha: Replace setup_irq() by request_irq() 2020-03-29 21:03:41 +02:00
irq_pyxis.c alpha: Replace setup_irq() by request_irq() 2020-03-29 21:03:41 +02:00
irq_srm.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
machvec_impl.h alpha: add full ioread64/iowrite64 implementation 2022-10-04 11:23:29 +02:00
module.c alpha: fix R_ALPHA_LITERAL reloc for large modules 2023-02-14 12:37:18 -05:00
osf_sys.c alpha: osf_sys: reduce kernel log spamming on invalid osf_mount call typenr 2023-02-14 12:36:10 -05:00
pc873xx.c alpha: eliminate old-style function definitions 2021-05-06 19:24:11 -07:00
pc873xx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci-noop.c treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
pci-sysfs.c alpha: pci-sysfs: fix all kernel-doc warnings 2021-09-08 11:50:25 -07:00
pci.c treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
pci_impl.h alpha: fix reboot on Avanti platform 2018-01-20 17:01:10 -08:00
pci_iommu.c alpha: Avoid comma separated statements 2023-02-24 23:14:22 -05:00
perf_event.c alpha: remove redundant err variable 2023-02-14 12:36:10 -05:00
process.c sched/idle: Mark arch_cpu_idle_dead() __noreturn 2023-03-08 08:44:28 -08:00
proto.h alpha: remove DISCONTIGMEM and NUMA 2021-06-29 10:53:55 -07:00
ptrace.c alpha: lazy FPU switching 2023-02-24 23:14:22 -05:00
rtc.c rtc: Check return value from mc146818_get_time() 2021-12-16 21:50:06 +01:00
setup.c alpha: move from strlcpy with unused retval to strscpy 2022-09-11 21:55:09 -07:00
signal.c alpha: lazy FPU switching 2023-02-24 23:14:22 -05:00
smc37c93x.c arch: mostly remove <asm/segment.h> 2019-04-23 21:51:40 +02:00
smc37c669.c arch: mostly remove <asm/segment.h> 2019-04-23 21:51:40 +02:00
smp.c arch/alpha/kernel/smp.c: remove unnecessary (void*) conversions 2023-02-02 22:50:00 -08:00
srm_env.c proc: remove PDE_DATA() completely 2022-01-22 08:33:37 +02:00
srmcons.c tty: the rest, stop using tty_schedule_flip() 2021-11-25 18:35:23 +01:00
sys_alcor.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_cabriolet.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_dp264.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_eb64p.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_eiger.c alpha: remove unneeded semicolon in sys_eiger.c 2020-06-12 17:43:17 -07:00
sys_jensen.c alpha: mark 'Jensen' platform as no longer broken 2021-09-18 14:12:39 -07:00
sys_marvel.c alpha: remove DISCONTIGMEM and NUMA 2021-06-29 10:53:55 -07:00
sys_miata.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_mikasa.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_nautilus.c alpha: fix spelling mistakes 2021-07-25 22:33:04 -07:00
sys_noritake.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_rawhide.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_ruffian.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_rx164.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_sable.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_sio.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_sx164.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_takara.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_titan.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
sys_wildfire.c alpha: remove DISCONTIGMEM and NUMA 2021-06-29 10:53:55 -07:00
systbls.S alpha: syscalls: switch to generic syscalltbl.sh 2021-04-25 05:25:22 +09:00
termios.c termios: start unifying non-UAPI parts of asm/termios.h 2022-09-09 10:44:34 +02:00
time.c alpha: Replace setup_irq() by request_irq() 2020-03-29 21:03:41 +02:00
traps.c alpha: fix FEN fault handling 2023-02-24 23:14:22 -05:00
vmlinux.lds.S objtool/idle: Validate __cpuidle code as noinstr 2023-01-13 11:48:15 +01:00