Date: Sun, 6 Jan 2019 00:55:23 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r342803 - in stable/11/sys/compat/linuxkpi/common: include/linux src Message-ID: <201901060055.x060tNWi040026@repo.freebsd.org>
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Author: kib Date: Sun Jan 6 00:55:23 2019 New Revision: 342803 URL: https://svnweb.freebsd.org/changeset/base/342803 Log: MFC r342627: Implement zap_vma_ptes() for managed device objects. Modified: stable/11/sys/compat/linuxkpi/common/include/linux/mm.h stable/11/sys/compat/linuxkpi/common/src/linux_compat.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/compat/linuxkpi/common/include/linux/mm.h ============================================================================== --- stable/11/sys/compat/linuxkpi/common/include/linux/mm.h Sun Jan 6 00:54:08 2019 (r342802) +++ stable/11/sys/compat/linuxkpi/common/include/linux/mm.h Sun Jan 6 00:55:23 2019 (r342803) @@ -180,12 +180,8 @@ apply_to_page_range(struct mm_struct *mm, unsigned lon return (-ENOTSUP); } -static inline int -zap_vma_ptes(struct vm_area_struct *vma, unsigned long address, - unsigned long size) -{ - return (-ENOTSUP); -} +int zap_vma_ptes(struct vm_area_struct *vma, unsigned long address, + unsigned long size); static inline int remap_pfn_range(struct vm_area_struct *vma, unsigned long addr, Modified: stable/11/sys/compat/linuxkpi/common/src/linux_compat.c ============================================================================== --- stable/11/sys/compat/linuxkpi/common/src/linux_compat.c Sun Jan 6 00:54:08 2019 (r342802) +++ stable/11/sys/compat/linuxkpi/common/src/linux_compat.c Sun Jan 6 00:55:23 2019 (r342803) @@ -672,6 +672,25 @@ static struct cdev_pager_ops linux_cdev_pager_ops[2] = }, }; +int +zap_vma_ptes(struct vm_area_struct *vma, unsigned long address, + unsigned long size) +{ + vm_object_t obj; + vm_page_t m; + + obj = vma->vm_obj; + if (obj == NULL || (obj->flags & OBJ_UNMANAGED) != 0) + return (-ENOTSUP); + VM_OBJECT_RLOCK(obj); + for (m = vm_page_find_least(obj, OFF_TO_IDX(address)); + m != NULL && m->pindex < OFF_TO_IDX(address + size); + m = TAILQ_NEXT(m, listq)) + pmap_remove_all(m); + VM_OBJECT_RUNLOCK(obj); + return (0); +} + #define OPW(fp,td,code) ({ \ struct file *__fpop; \ __typeof(code) __retval; \
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