函数源码 |
Source File:include\asm-generic\pgtable.h |
Create Date:2022-07-27 06:58:58 |
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642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 | #ifndef __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION/* * Start a pte protection read-modify-write transaction, which * protects against asynchronous hardware modifications to the pte. * The intention is not to prevent the hardware from making pte * updates, but to prevent any updates it may make from being lost. * * This does not protect against other software modifications of the * pte; the appropriate pte lock must be held over the transation. * * Note that this interface is intended to be batchable, meaning that * ptep_modify_prot_commit may not actually update the pte, but merely * queue the update to be done at some later time. The update must be * actually committed before the pte lock is released, however. */static inline pte_t ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep){ return __ptep_modify_prot_start(vma, addr, ptep);} |