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| author | Borislav Petkov <bp@suse.de> | 2020-04-04 01:33:05 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-04-14 14:24:05 +0200 |
| commit | 593309423cbad0fab659a685834416cf12d8f581 (patch) | |
| tree | 16cf472c78d953b15ca67886ab1387f03c1841ef /arch/x86/mm/cpu_entry_area.c | |
| parent | 8f3d9f354286745c751374f5f1fcafee6b3f3136 (diff) | |
| download | lwn-593309423cbad0fab659a685834416cf12d8f581.tar.gz lwn-593309423cbad0fab659a685834416cf12d8f581.zip | |
x86/32: Remove CONFIG_DOUBLEFAULT
Make the doublefault exception handler unconditional on 32-bit. Yes,
it is important to be able to catch #DF exceptions instead of silent
reboots. Yes, the code size increase is worth every byte. And one less
CONFIG symbol is just the cherry on top.
No functional changes.
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200404083646.8897-1-bp@alien8.de
Diffstat (limited to 'arch/x86/mm/cpu_entry_area.c')
| -rw-r--r-- | arch/x86/mm/cpu_entry_area.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/x86/mm/cpu_entry_area.c b/arch/x86/mm/cpu_entry_area.c index 56f9189bbadb..5199d8a1daf1 100644 --- a/arch/x86/mm/cpu_entry_area.c +++ b/arch/x86/mm/cpu_entry_area.c @@ -17,7 +17,7 @@ static DEFINE_PER_CPU_PAGE_ALIGNED(struct exception_stacks, exception_stacks); DEFINE_PER_CPU(struct cea_exception_stacks*, cea_exception_stacks); #endif -#if defined(CONFIG_X86_32) && defined(CONFIG_DOUBLEFAULT) +#ifdef CONFIG_X86_32 DECLARE_PER_CPU_PAGE_ALIGNED(struct doublefault_stack, doublefault_stack); #endif @@ -114,12 +114,10 @@ static void __init percpu_setup_exception_stacks(unsigned int cpu) #else static inline void percpu_setup_exception_stacks(unsigned int cpu) { -#ifdef CONFIG_DOUBLEFAULT struct cpu_entry_area *cea = get_cpu_entry_area(cpu); cea_map_percpu_pages(&cea->doublefault_stack, &per_cpu(doublefault_stack, cpu), 1, PAGE_KERNEL); -#endif } #endif |