git: 97f2e93a66a8 - main - LinuxKPI: add ALIGN_DOWN()

From: Bjoern A. Zeeb <bz_at_FreeBSD.org>
Date: Fri, 08 Apr 2022 18:29:36 UTC
The branch main has been updated by bz:

URL: https://cgit.FreeBSD.org/src/commit/?id=97f2e93a66a804ae9b6187998dbc4427b647e274

commit 97f2e93a66a804ae9b6187998dbc4427b647e274
Author:     Bjoern A. Zeeb <bz@FreeBSD.org>
AuthorDate: 2022-04-08 15:30:19 +0000
Commit:     Bjoern A. Zeeb <bz@FreeBSD.org>
CommitDate: 2022-04-08 18:27:49 +0000

    LinuxKPI: add ALIGN_DOWN()
    
    Add ALIGN_DOWN as rounddown2() along ALIGN() which is implemented as
    roundup2().
    
    Sponsored by:   The FreeBSD Foundation
    MFC after:      3 days
    Reviewed by:    manu, hselasky (now with less ())
    Differential Revision: https://reviews.freebsd.org/D34844
---
 sys/compat/linuxkpi/common/include/linux/kernel.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/kernel.h b/sys/compat/linuxkpi/common/include/linux/kernel.h
index 8fb92dd2f93e..51f2ffe01e15 100644
--- a/sys/compat/linuxkpi/common/include/linux/kernel.h
+++ b/sys/compat/linuxkpi/common/include/linux/kernel.h
@@ -150,6 +150,7 @@ extern int linuxkpi_warn_dump_stack;
 
 #undef	ALIGN
 #define	ALIGN(x, y)		roundup2((x), (y))
+#define	ALIGN_DOWN(x, y)	rounddown2(x, y)
 #undef PTR_ALIGN
 #define	PTR_ALIGN(p, a)		((__typeof(p))ALIGN((uintptr_t)(p), (a)))
 #define	IS_ALIGNED(x, a)	(((x) & ((__typeof(x))(a) - 1)) == 0)