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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2017-07-19 07:49:46 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-08-03 09:06:52 +0300 |
| commit | 6ff4d3e9665274b69cff47f64cc20183465a1de2 (patch) | |
| tree | 4f3bba88d8edef0e77997a9df8468df74e34e9ac /arch/powerpc/mm/mmu_context_book3s64.c | |
| parent | 8f5ca0b3195a9afff448004c2141d01a11f481da (diff) | |
| download | linux-6ff4d3e9665274b69cff47f64cc20183465a1de2.tar.xz | |
powerpc: Remove old unused icswx based coprocessor support
We have a whole pile of unused code to maintain the ACOP register,
allocate coprocessor PIDs and handle ACOP faults. This mechanism
was used for the HFI adapter on POWER7 which is dead and gone and
whose driver never went upstream. It was used on some A2 core based
stuff that also never saw the light of day.
Take out all that code.
There is still some POWER8 coprocessor code that uses icswx but it's
kernel only and thus doesn't use any of that infrastructure.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/mmu_context_book3s64.c')
| -rw-r--r-- | arch/powerpc/mm/mmu_context_book3s64.c | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/arch/powerpc/mm/mmu_context_book3s64.c b/arch/powerpc/mm/mmu_context_book3s64.c index abed1fe6992f..db9d8cb0f8ee 100644 --- a/arch/powerpc/mm/mmu_context_book3s64.c +++ b/arch/powerpc/mm/mmu_context_book3s64.c @@ -25,8 +25,6 @@ #include <asm/mmu_context.h> #include <asm/pgalloc.h> -#include "icswx.h" - static DEFINE_SPINLOCK(mmu_context_lock); static DEFINE_IDA(mmu_context_ida); @@ -164,16 +162,6 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm) return index; mm->context.id = index; -#ifdef CONFIG_PPC_ICSWX - mm->context.cop_lockp = kmalloc(sizeof(spinlock_t), GFP_KERNEL); - if (!mm->context.cop_lockp) { - __destroy_context(index); - subpage_prot_free(mm); - mm->context.id = MMU_NO_CONTEXT; - return -ENOMEM; - } - spin_lock_init(mm->context.cop_lockp); -#endif /* CONFIG_PPC_ICSWX */ #ifdef CONFIG_PPC_64K_PAGES mm->context.pte_frag = NULL; @@ -225,12 +213,6 @@ void destroy_context(struct mm_struct *mm) #ifdef CONFIG_SPAPR_TCE_IOMMU WARN_ON_ONCE(!list_empty(&mm->context.iommu_group_mem_list)); #endif -#ifdef CONFIG_PPC_ICSWX - drop_cop(mm->context.acop, mm); - kfree(mm->context.cop_lockp); - mm->context.cop_lockp = NULL; -#endif /* CONFIG_PPC_ICSWX */ - if (radix_enabled()) { /* * Radix doesn't have a valid bit in the process table |