From 51dbd92520d4344fef78481b1bcbc3a7de32b69b Mon Sep 17 00:00:00 2001
From: Hari Bathini
Date: Mon, 8 May 2017 15:56:21 -0700
Subject: ia64: reuse append_elf_note() and final_note() functions

Get rid of multiple definitions of append_elf_note() & final_note()
functions.  Reuse these functions compiled under CONFIG_CRASH_CORE Also,
define Elf_Word and use it instead of generic u32 or the more specific
Elf64_Word.

Link: http://lkml.kernel.org/r/149035342324.6881.11667840929850361402.stgit@hbathini.in.ibm.com
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 kernel/crash_core.c | 34 ++++++++++++++--------------------
 kernel/kexec_core.c | 28 ----------------------------
 2 files changed, 14 insertions(+), 48 deletions(-)

(limited to 'kernel')

diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index 4261587a34d2..fcbd568f1e95 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_core.c
@@ -291,32 +291,26 @@ int __init parse_crashkernel_low(char *cmdline,
 				"crashkernel=", suffix_tbl[SUFFIX_LOW]);
 }
 
-static u32 *append_elf_note(u32 *buf, char *name, unsigned int type,
-			    void *data, size_t data_len)
+Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
+			  void *data, size_t data_len)
 {
-	struct elf_note note;
-
-	note.n_namesz = strlen(name) + 1;
-	note.n_descsz = data_len;
-	note.n_type   = type;
-	memcpy(buf, &note, sizeof(note));
-	buf += (sizeof(note) + 3)/4;
-	memcpy(buf, name, note.n_namesz);
-	buf += (note.n_namesz + 3)/4;
-	memcpy(buf, data, note.n_descsz);
-	buf += (note.n_descsz + 3)/4;
+	struct elf_note *note = (struct elf_note *)buf;
+
+	note->n_namesz = strlen(name) + 1;
+	note->n_descsz = data_len;
+	note->n_type   = type;
+	buf += DIV_ROUND_UP(sizeof(*note), sizeof(Elf_Word));
+	memcpy(buf, name, note->n_namesz);
+	buf += DIV_ROUND_UP(note->n_namesz, sizeof(Elf_Word));
+	memcpy(buf, data, data_len);
+	buf += DIV_ROUND_UP(data_len, sizeof(Elf_Word));
 
 	return buf;
 }
 
-static void final_note(u32 *buf)
+void final_note(Elf_Word *buf)
 {
-	struct elf_note note;
-
-	note.n_namesz = 0;
-	note.n_descsz = 0;
-	note.n_type   = 0;
-	memcpy(buf, &note, sizeof(note));
+	memset(buf, 0, sizeof(struct elf_note));
 }
 
 static void update_vmcoreinfo_note(void)
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index 9dd722912850..ae1a3ba24df5 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -990,34 +990,6 @@ unlock:
 	return ret;
 }
 
-static u32 *append_elf_note(u32 *buf, char *name, unsigned type, void *data,
-			    size_t data_len)
-{
-	struct elf_note note;
-
-	note.n_namesz = strlen(name) + 1;
-	note.n_descsz = data_len;
-	note.n_type   = type;
-	memcpy(buf, &note, sizeof(note));
-	buf += (sizeof(note) + 3)/4;
-	memcpy(buf, name, note.n_namesz);
-	buf += (note.n_namesz + 3)/4;
-	memcpy(buf, data, note.n_descsz);
-	buf += (note.n_descsz + 3)/4;
-
-	return buf;
-}
-
-static void final_note(u32 *buf)
-{
-	struct elf_note note;
-
-	note.n_namesz = 0;
-	note.n_descsz = 0;
-	note.n_type   = 0;
-	memcpy(buf, &note, sizeof(note));
-}
-
 void crash_save_cpu(struct pt_regs *regs, int cpu)
 {
 	struct elf_prstatus prstatus;
-- 
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