Date: Mon, 18 May 2020 09:35:42 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r361201 - stable/12/sys/compat/linuxkpi/common/src Message-ID: <202005180935.04I9Zg7H071329@repo.freebsd.org>
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Author: hselasky Date: Mon May 18 09:35:42 2020 New Revision: 361201 URL: https://svnweb.freebsd.org/changeset/base/361201 Log: MFC r360621: Fix warning about sleeping with non-sleepable lock when allocating "current" from linux_cdev_pager_populate() in the LinuxKPI: Backtrace: witness_debugger() witness_warn() uma_zalloc_arg() malloc() linux_alloc_current() linux_cdev_pager_populate() vm_fault() vm_fault_trap() trap_pfault() trap() calltrap() Suggested by: avg@ Sponsored by: Mellanox Technologies Modified: stable/12/sys/compat/linuxkpi/common/src/linux_compat.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/compat/linuxkpi/common/src/linux_compat.c ============================================================================== --- stable/12/sys/compat/linuxkpi/common/src/linux_compat.c Mon May 18 09:34:41 2020 (r361200) +++ stable/12/sys/compat/linuxkpi/common/src/linux_compat.c Mon May 18 09:35:42 2020 (r361201) @@ -528,14 +528,14 @@ linux_cdev_pager_populate(vm_object_t vm_obj, vm_pinde struct vm_area_struct *vmap; int err; - linux_set_current(curthread); - /* get VM area structure */ vmap = linux_cdev_handle_find(vm_obj->handle); MPASS(vmap != NULL); MPASS(vmap->vm_private_data == vm_obj->handle); VM_OBJECT_WUNLOCK(vm_obj); + + linux_set_current(curthread); down_write(&vmap->vm_mm->mmap_sem); if (unlikely(vmap->vm_ops == NULL)) {
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