From 932df7414336a00f45e5aec62724cf736b0bcfd4 Mon Sep 17 00:00:00 2001 From: Lin Ming Date: Mon, 16 May 2011 09:11:00 +0800 Subject: ACPI: processor: fix processor_physically_present in UP kernel Usually, there are multiple processors defined in ACPI table, for example Scope (_PR) { Processor (CPU0, 0x00, 0x00000410, 0x06) {} Processor (CPU1, 0x01, 0x00000410, 0x06) {} Processor (CPU2, 0x02, 0x00000410, 0x06) {} Processor (CPU3, 0x03, 0x00000410, 0x06) {} } processor_physically_present(...) will be called to check whether those processors are physically present. Currently we have below codes in processor_physically_present, cpuid = acpi_get_cpuid(...); if ((cpuid == -1) && (num_possible_cpus() > 1)) return false; return true; In UP kernel, acpi_get_cpuid(...) always return -1 and num_possible_cpus() always return 1, so processor_physically_present(...) always returns true for all passed in processor handles. This is wrong for UP processor or SMP processor running UP kernel. This patch removes the !SMP version of acpi_get_cpuid(), so both UP and SMP kernel use the same acpi_get_cpuid function. And for UP kernel, only processor 0 is valid. https://bugzilla.kernel.org/show_bug.cgi?id=16548 https://bugzilla.kernel.org/show_bug.cgi?id=16357 Tested-by: Anton Kochkov Tested-by: Ambroz Bizjak Signed-off-by: Lin Ming Signed-off-by: Len Brown --- include/acpi/processor.h | 7 ------- 1 file changed, 7 deletions(-) (limited to 'include/acpi') diff --git a/include/acpi/processor.h b/include/acpi/processor.h index 55192ac..ba4928c 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -310,14 +310,7 @@ static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit) /* in processor_core.c */ void acpi_processor_set_pdc(acpi_handle handle); -#ifdef CONFIG_SMP int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id); -#else -static inline int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id) -{ - return -1; -} -#endif /* in processor_throttling.c */ int acpi_processor_tstate_has_changed(struct acpi_processor *pr); -- cgit v1.1