[PATCH v4 5/7] reset: x86: Use cpu_hlt() in efi_reset_system()

[dmukhin at ford.com]

Use cpu_hlt() in busy loop in efi_reset_system() similarly to
pch_sysreset_power_off().

Note, this is safe for __efi_runtime-annotated efi_reset_system(),
because cpu_hlt() expands to a bare "hlt".

Signed-off-by: Denis Mukhin <dmukhin at ford.com>
---
Changes since v3:
- new patch
---
 drivers/sysreset/sysreset_x86.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/sysreset/sysreset_x86.c b/drivers/sysreset/sysreset_x86.c
index 05a3ff9c8363..afb77d9c5c21 100644
--- a/drivers/sysreset/sysreset_x86.c
+++ b/drivers/sysreset/sysreset_x86.c
@@ -120,7 +120,8 @@ void __efi_runtime EFIAPI efi_reset_system(
 
 	/* TODO EFI_RESET_SHUTDOWN */
 
-	while (1) { }
+	for (;;)
+		cpu_hlt();
 }
 #endif
 
-- 
2.54.0