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| author | Will Deacon <will.deacon@arm.com> | 2015-05-29 18:28:44 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2015-07-27 11:08:40 +0100 |
| commit | 4b3dc9679cf779339d9049800803dfc3c83433d1 (patch) | |
| tree | 8c04c26a614240f3142b7afafc071719fc3ea0f5 /arch/arm64/mm/context.c | |
| parent | 52da443ec4d0a807b720527eb474f9c2878cd671 (diff) | |
| download | linux-4b3dc9679cf779339d9049800803dfc3c83433d1.tar.gz linux-4b3dc9679cf779339d9049800803dfc3c83433d1.tar.bz2 linux-4b3dc9679cf779339d9049800803dfc3c83433d1.zip | |
arm64: force CONFIG_SMP=y and remove redundant #ifdefs
Nobody seems to be producing !SMP systems anymore, so this is just
becoming a source of kernel bugs, particularly if people want to use
coherent DMA with non-shared pages.
This patch forces CONFIG_SMP=y for arm64, removing a modest amount of
code in the process.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/mm/context.c')
| -rw-r--r-- | arch/arm64/mm/context.c | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c index 76c1e6cd36fc..d70ff14dbdbd 100644 --- a/arch/arm64/mm/context.c +++ b/arch/arm64/mm/context.c @@ -53,8 +53,6 @@ static void flush_context(void) __flush_icache_all(); } -#ifdef CONFIG_SMP - static void set_mm_context(struct mm_struct *mm, unsigned int asid) { unsigned long flags; @@ -110,23 +108,12 @@ static void reset_context(void *info) cpu_switch_mm(mm->pgd, mm); } -#else - -static inline void set_mm_context(struct mm_struct *mm, unsigned int asid) -{ - mm->context.id = asid; - cpumask_copy(mm_cpumask(mm), cpumask_of(smp_processor_id())); -} - -#endif - void __new_context(struct mm_struct *mm) { unsigned int asid; unsigned int bits = asid_bits(); raw_spin_lock(&cpu_asid_lock); -#ifdef CONFIG_SMP /* * Check the ASID again, in case the change was broadcast from another * CPU before we acquired the lock. @@ -136,7 +123,6 @@ void __new_context(struct mm_struct *mm) raw_spin_unlock(&cpu_asid_lock); return; } -#endif /* * At this point, it is guaranteed that the current mm (with an old * ASID) isn't active on any other CPU since the ASIDs are changed @@ -155,10 +141,8 @@ void __new_context(struct mm_struct *mm) cpu_last_asid = ASID_FIRST_VERSION; asid = cpu_last_asid + smp_processor_id(); flush_context(); -#ifdef CONFIG_SMP smp_wmb(); smp_call_function(reset_context, NULL, 1); -#endif cpu_last_asid += NR_CPUS - 1; } |