powerpc/mm: Fix compile error of pgtable-ppc64.h
It seems that forward declaration couldn't work well with typedef, use struct spinlock directly to avoiding following build errors: In file included from include/linux/spinlock.h:81, from include/linux/seqlock.h:35, from include/linux/time.h:5, from include/uapi/linux/timex.h:56, from include/linux/timex.h:56, from include/linux/sched.h:17, from arch/powerpc/kernel/asm-offsets.c:17: include/linux/spinlock_types.h:76: error: redefinition of typedef 'spinlock_t' /root/linux-next/arch/powerpc/include/asm/pgtable-ppc64.h:563: note: previous declaration of 'spinlock_t' was here Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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@ -560,9 +560,9 @@ extern void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
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pmd_t *pmdp);
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#define pmd_move_must_withdraw pmd_move_must_withdraw
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typedef struct spinlock spinlock_t;
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static inline int pmd_move_must_withdraw(spinlock_t *new_pmd_ptl,
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spinlock_t *old_pmd_ptl)
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struct spinlock;
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static inline int pmd_move_must_withdraw(struct spinlock *new_pmd_ptl,
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struct spinlock *old_pmd_ptl)
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{
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/*
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* Archs like ppc64 use pgtable to store per pmd
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