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Date:   Mon, 7 Mar 2022 11:43:21 -0500
From:   Johannes Weiner <hannes@cmpxchg.org>
To:     Stephen Rothwell <sfr@canb.auug.org.au>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>,
        Linux Kernel Functional Testing <lkft@linaro.org>
Subject: Re: linux-next: build failure after merge of the akpm tree
Message-ID: <YiY2KYyjsCaANwo0@cmpxchg.org>
References: <20220307215530.7c981424@canb.auug.org.au>
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Sorry about that. This should fix it:

---
From a4d90a5faa418d98f925abe47b1a4fcffc4283f9 Mon Sep 17 00:00:00 2001
From: Johannes Weiner <hannes@cmpxchg.org>
Date: Mon, 7 Mar 2022 11:38:42 -0500
Subject: [PATCH] mm: madvise: MADV_DONTNEED_LOCKED fix

On MiPS:
mm/madvise.c:55:7: error: 'MADV_DONTNEED_LOCKED' undeclared (first use in this function); did you mean 'MADV_DONTNEED'?

Define MADV_DONTNEED_LOCKED on archs that don't use the common mman.h

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
---
 arch/alpha/include/uapi/asm/mman.h  | 2 ++
 arch/mips/include/uapi/asm/mman.h   | 2 ++
 arch/parisc/include/uapi/asm/mman.h | 2 ++
 arch/xtensa/include/uapi/asm/mman.h | 2 ++
 4 files changed, 8 insertions(+)

diff --git a/arch/alpha/include/uapi/asm/mman.h b/arch/alpha/include/uapi/asm/mman.h
index 56b4ee5a6c9e..4aa996423b0d 100644
--- a/arch/alpha/include/uapi/asm/mman.h
+++ b/arch/alpha/include/uapi/asm/mman.h
@@ -74,6 +74,8 @@
 #define MADV_POPULATE_READ	22	/* populate (prefault) page tables readable */
 #define MADV_POPULATE_WRITE	23	/* populate (prefault) page tables writable */
 
+#define MADV_DONTNEED_LOCKED	24	/* like DONTNEED, but drop locked pages too */
+
 /* compatibility flags */
 #define MAP_FILE	0
 
diff --git a/arch/mips/include/uapi/asm/mman.h b/arch/mips/include/uapi/asm/mman.h
index 40b210c65a5a..1be428663c10 100644
--- a/arch/mips/include/uapi/asm/mman.h
+++ b/arch/mips/include/uapi/asm/mman.h
@@ -101,6 +101,8 @@
 #define MADV_POPULATE_READ	22	/* populate (prefault) page tables readable */
 #define MADV_POPULATE_WRITE	23	/* populate (prefault) page tables writable */
 
+#define MADV_DONTNEED_LOCKED	24	/* like DONTNEED, but drop locked pages too */
+
 /* compatibility flags */
 #define MAP_FILE	0
 
diff --git a/arch/parisc/include/uapi/asm/mman.h b/arch/parisc/include/uapi/asm/mman.h
index 9e3c010c0f61..a7ea3204a5fa 100644
--- a/arch/parisc/include/uapi/asm/mman.h
+++ b/arch/parisc/include/uapi/asm/mman.h
@@ -55,6 +55,8 @@
 #define MADV_POPULATE_READ	22	/* populate (prefault) page tables readable */
 #define MADV_POPULATE_WRITE	23	/* populate (prefault) page tables writable */
 
+#define MADV_DONTNEED_LOCKED	24	/* like DONTNEED, but drop locked pages too */
+
 #define MADV_MERGEABLE   65		/* KSM may merge identical pages */
 #define MADV_UNMERGEABLE 66		/* KSM may not merge identical pages */
 
diff --git a/arch/xtensa/include/uapi/asm/mman.h b/arch/xtensa/include/uapi/asm/mman.h
index b3a22095371b..7966a58af472 100644
--- a/arch/xtensa/include/uapi/asm/mman.h
+++ b/arch/xtensa/include/uapi/asm/mman.h
@@ -109,6 +109,8 @@
 #define MADV_POPULATE_READ	22	/* populate (prefault) page tables readable */
 #define MADV_POPULATE_WRITE	23	/* populate (prefault) page tables writable */
 
+#define MADV_DONTNEED_LOCKED	24	/* like DONTNEED, but drop locked pages too */
+
 /* compatibility flags */
 #define MAP_FILE	0
 
-- 
2.35.1