git: 97f3e018fa2f - stable/12 - LinuxKPI: add fault_flag_allow_retry_first

[Ed Maste]

The branch stable/12 has been updated by emaste:

URL: https://cgit.FreeBSD.org/src/commit/?id=97f3e018fa2f4af8fec23a4ac391d55b29da3978

commit 97f3e018fa2f4af8fec23a4ac391d55b29da3978
Author:     Greg V <greg at unrelenting.technology>
AuthorDate: 2021-06-09 23:09:16 +0000
Commit:     Ed Maste <emaste at FreeBSD.org>
CommitDate: 2021-06-16 16:48:49 +0000

    LinuxKPI: add fault_flag_allow_retry_first
    
    Used by drm 5.7.
    
    Reviewed by:    bz, hselasky, nc
    MFC after:      1 week
    Differential Revision:  https://reviews.freebsd.org/D30673
    
    (cherry picked from commit 597cc550e7b98294617cdd41800e9f132b6bcad9)
---
 sys/compat/linuxkpi/common/include/linux/mm.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/mm.h b/sys/compat/linuxkpi/common/include/linux/mm.h
index 7710b9d61812..ecc63b85d5b9 100644
--- a/sys/compat/linuxkpi/common/include/linux/mm.h
+++ b/sys/compat/linuxkpi/common/include/linux/mm.h
@@ -91,6 +91,9 @@ CTASSERT((VM_PROT_ALL & -(1 << 8)) == 0);
 #define	FAULT_FLAG_REMOTE	(1 << 7)
 #define	FAULT_FLAG_INSTRUCTION	(1 << 8)
 
+#define fault_flag_allow_retry_first(flags) \
+	(((flags) & (FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_TRIED)) == FAULT_FLAG_ALLOW_RETRY)
+
 typedef int (*pte_fn_t)(linux_pte_t *, pgtable_t, unsigned long addr, void *data);
 
 struct vm_area_struct {