From 4adf05e0be228faa3848fd1b8909a1458aaa60c4 Mon Sep 17 00:00:00 2001 From: Suren Baghdasaryan Date: Mon, 27 Feb 2023 09:36:24 -0800 Subject: [PATCH] mm: add FAULT_FLAG_VMA_LOCK flag Add a new flag to distinguish page faults handled under protection of per-vma lock. Link: https://lkml.kernel.org/r/20230227173632.3292573-26-surenb@google.com Signed-off-by: Suren Baghdasaryan Reviewed-by: Laurent Dufour Signed-off-by: Andrew Morton --- include/linux/mm.h | 3 ++- include/linux/mm_types.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index fca532a51049..82ea2ae374de 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -478,7 +478,8 @@ static inline bool fault_flag_allow_retry_first(enum fault_flag flags) { FAULT_FLAG_USER, "USER" }, \ { FAULT_FLAG_REMOTE, "REMOTE" }, \ { FAULT_FLAG_INSTRUCTION, "INSTRUCTION" }, \ - { FAULT_FLAG_INTERRUPTIBLE, "INTERRUPTIBLE" } + { FAULT_FLAG_INTERRUPTIBLE, "INTERRUPTIBLE" }, \ + { FAULT_FLAG_VMA_LOCK, "VMA_LOCK" } /* * vm_fault is filled by the pagefault handler and passed to the vma's diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index bad9f456e88a..24a14ab42eef 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -1092,6 +1092,7 @@ enum fault_flag { FAULT_FLAG_INTERRUPTIBLE = 1 << 9, FAULT_FLAG_UNSHARE = 1 << 10, FAULT_FLAG_ORIG_PTE_VALID = 1 << 11, + FAULT_FLAG_VMA_LOCK = 1 << 12, }; typedef unsigned int __bitwise zap_flags_t; -- 2.50.1