linux/arch/loongarch
Tiezhu Yang c337c849ab LoongArch: Put the body of play_dead() into arch_cpu_idle_dead()
The initial aim is to silence the following objtool warning:

arch/loongarch/kernel/process.o: warning: objtool: arch_cpu_idle_dead() falls through to next function start_thread()

According to tools/objtool/Documentation/objtool.txt, this is because
the last instruction of arch_cpu_idle_dead() is a call to a noreturn
function play_dead(). In order to silence the warning, one simple way
is to add the noreturn function play_dead() to objtool's hard-coded
global_noreturns array, that is to say, just put "NORETURN(play_dead)"
into tools/objtool/noreturns.h, it works well.

But I noticed that play_dead() is only defined once and only called by
arch_cpu_idle_dead(), so put the body of play_dead() into the caller
arch_cpu_idle_dead(), then remove the noreturn function play_dead() is
an alternative way which can reduce the overhead of the function call
at the same time.

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-08-25 23:40:38 +08:00
..
boot loongarch: efi: enable generic EFI compressed boot 2022-09-20 09:50:31 +02:00
configs arch/*/configs/*defconfig: Replace AUTOFS4_FS by AUTOFS_FS 2023-07-29 14:08:22 -07:00
crypto LoongArch: crypto: Add crc32 and crc32c hw acceleration 2023-05-01 17:19:43 +08:00
include LoongArch: Put the body of play_dead() into arch_cpu_idle_dead() 2023-08-25 23:40:38 +08:00
kernel LoongArch: Put the body of play_dead() into arch_cpu_idle_dead() 2023-08-25 23:40:38 +08:00
lib LoongArch: Replace #include <asm/export.h> with #include <linux/export.h> 2023-08-25 23:40:26 +08:00
mm LoongArch: Replace #include <asm/export.h> with #include <linux/export.h> 2023-08-25 23:40:26 +08:00
net LoongArch: BPF: Fix check condition to call lu32id in move_imm() 2023-07-28 10:30:42 +08:00
pci LoongArch: Add FDT booting support from efi system table 2022-12-14 08:41:53 +08:00
power LoongArch: Export some arch-specific pm interfaces 2023-06-29 20:58:44 +08:00
vdso LoongArch: Add support to clone a time namespace 2023-06-29 20:58:43 +08:00
Kbuild LoongArch: Add BPF JIT support 2022-10-12 16:36:20 +08:00
Kconfig LoongArch: Remove redundant "source drivers/firmware/Kconfig" 2023-08-25 23:40:26 +08:00
Kconfig.debug LoongArch: Add prologue unwinder support 2022-08-12 13:10:11 +08:00
Makefile LoongArch: Replace -ffreestanding with finer-grained -fno-builtin's 2023-08-25 23:40:26 +08:00