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[PATCH v4 2/2] x86/purgatory: Fix sparse warning, symbol not declared

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  [PATCH v4 2/2] x86/purgatory: Fix sparse warning, symbol not declared "Tobin C. Harding" <me@tobin.cc> - 2017-02-20 00:20 +0100
    [tip:x86/urgent] x86/purgatory: Fix sparse warning, symbol not  declared "tip-bot for Tobin C. Harding" <tipbot@zytor.com> - 2017-03-01 11:50 +0100

#1584283 — [PATCH v4 2/2] x86/purgatory: Fix sparse warning, symbol not declared

Sparse emits warning, 'symbol not declared' for a function that has
neither file scope nor a forward declaration. The functions only call
site is an ASM file.

Add a header file with the function declaration. Include the
header file in the C source file defining the function in order
to fix the sparse warning. Include the header file in ASM file
containing the call site to document the usage.

Signed-off-by: Tobin C. Harding <me@tobin.cc>
---
 arch/x86/purgatory/purgatory.c    |  1 +
 arch/x86/purgatory/purgatory.h    | 12 ++++++++++++
 arch/x86/purgatory/setup-x86_64.S |  4 ++--
 3 files changed, 15 insertions(+), 2 deletions(-)
 create mode 100644 arch/x86/purgatory/purgatory.h

diff --git a/arch/x86/purgatory/purgatory.c b/arch/x86/purgatory/purgatory.c
index 2a5f437..b6d5c89 100644
--- a/arch/x86/purgatory/purgatory.c
+++ b/arch/x86/purgatory/purgatory.c
@@ -11,6 +11,7 @@
  */
 
 #include "sha256.h"
+#include "purgatory.h"
 #include "../boot/string.h"
 
 struct sha_region {
diff --git a/arch/x86/purgatory/purgatory.h b/arch/x86/purgatory/purgatory.h
new file mode 100644
index 0000000..fb8b4f8
--- /dev/null
+++ b/arch/x86/purgatory/purgatory.h
@@ -0,0 +1,12 @@
+#ifndef PURGATORY_H
+#define PURGATORY_H
+
+#ifndef __ASSEMBLY__
+
+extern void purgatory(void);
+
+#endif	/* __ASSEMBLY__ */
+
+#endif /* PURGATORY_H */
+
+
diff --git a/arch/x86/purgatory/setup-x86_64.S b/arch/x86/purgatory/setup-x86_64.S
index fe3c91b..8045994 100644
--- a/arch/x86/purgatory/setup-x86_64.S
+++ b/arch/x86/purgatory/setup-x86_64.S
@@ -9,8 +9,8 @@
  * This source code is licensed under the GNU General Public License,
  * Version 2.  See the file COPYING for more details.
  */
-
-	.text
+#include "purgatory.h"	
+ 	.text
 	.globl purgatory_start
 	.balign 16
 purgatory_start:
-- 
2.7.4

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#1590223 — [tip:x86/urgent] x86/purgatory: Fix sparse warning, symbol not declared

Commit-ID:  e98fe5127b9cc8ab33d1094b81c19deb1f9082bf
Gitweb:     http://git.kernel.org/tip/e98fe5127b9cc8ab33d1094b81c19deb1f9082bf
Author:     Tobin C. Harding <me@tobin.cc>
AuthorDate: Mon, 20 Feb 2017 10:12:36 +1100
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 1 Mar 2017 11:27:26 +0100

x86/purgatory: Fix sparse warning, symbol not declared

Sparse emits warning, 'symbol not declared' for a function that has
neither file scope nor a forward declaration. The functions only call
site is an ASM file.

Add a header file with the function declaration. Include the header file in
the C source file defining the function in order to fix the sparse
warning. Include the header file in ASM file containing the call site to
document the usage.

Signed-off-by: Tobin C. Harding <me@tobin.cc>
Link: http://lkml.kernel.org/r/1487545956-2547-3-git-send-email-me@tobin.cc
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
 arch/x86/purgatory/purgatory.c    | 1 +
 arch/x86/purgatory/purgatory.h    | 8 ++++++++
 arch/x86/purgatory/setup-x86_64.S | 1 +
 3 files changed, 10 insertions(+)

diff --git a/arch/x86/purgatory/purgatory.c b/arch/x86/purgatory/purgatory.c
index 2a5f437..b6d5c89 100644
--- a/arch/x86/purgatory/purgatory.c
+++ b/arch/x86/purgatory/purgatory.c
@@ -11,6 +11,7 @@
  */
 
 #include "sha256.h"
+#include "purgatory.h"
 #include "../boot/string.h"
 
 struct sha_region {
diff --git a/arch/x86/purgatory/purgatory.h b/arch/x86/purgatory/purgatory.h
new file mode 100644
index 0000000..e2e365a
--- /dev/null
+++ b/arch/x86/purgatory/purgatory.h
@@ -0,0 +1,8 @@
+#ifndef PURGATORY_H
+#define PURGATORY_H
+
+#ifndef __ASSEMBLY__
+extern void purgatory(void);
+#endif	/* __ASSEMBLY__ */
+
+#endif /* PURGATORY_H */
diff --git a/arch/x86/purgatory/setup-x86_64.S b/arch/x86/purgatory/setup-x86_64.S
index fe3c91b..f90e9df 100644
--- a/arch/x86/purgatory/setup-x86_64.S
+++ b/arch/x86/purgatory/setup-x86_64.S
@@ -9,6 +9,7 @@
  * This source code is licensed under the GNU General Public License,
  * Version 2.  See the file COPYING for more details.
  */
+#include "purgatory.h"
 
 	.text
 	.globl purgatory_start

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