fbdev: move logo externs to header file

Now we have __initconst, we can finally move the external declarations for
the various Linux logo structures to <linux/linux_logo.h>.

James' ack dates back to the previous submission (way to long ago), when the
logos were still __initdata, which caused failures on some platforms with some
toolchain versions.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: James Simmons <jsimmons@infradead.org>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 2f0e64b..ef6f649 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -44,10 +44,7 @@
 #include <asm/sections.h>
 #include <asm/machdep.h>
 
-#ifdef CONFIG_LOGO_LINUX_CLUT224
 #include <linux/linux_logo.h>
-extern const struct linux_logo logo_linux_clut224;
-#endif
 
 /*
  * Properties whose value is longer than this get excluded from our
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index 9abd210..8547e86 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -752,17 +752,8 @@
 		goto out_unregister_sysdev_class;
 	}
 
-	if (ret > 0) {
-		/*
-		 * We cannot put the forward declaration in
-		 * <linux/linux_logo.h> because of conflicting session type
-		 * conflicts for const and __initdata with different compiler
-		 * versions
-		 */
-		extern const struct linux_logo logo_spe_clut224;
-
+	if (ret > 0)
 		fb_append_extra_logo(&logo_spe_clut224, ret);
-	}
 
 	mutex_lock(&spu_full_list_mutex);
 	xmon_register_spus(&spu_full_list);
diff --git a/arch/um/include/shared/init.h b/arch/um/include/shared/init.h
index 37dd097..b3906f8 100644
--- a/arch/um/include/shared/init.h
+++ b/arch/um/include/shared/init.h
@@ -27,7 +27,7 @@
  * sign followed by value, e.g.:
  *
  * static int init_variable __initdata = 0;
- * static char linux_logo[] __initdata = { 0x32, 0x36, ... };
+ * static const char linux_logo[] __initconst = { 0x32, 0x36, ... };
  *
  * Don't forget to initialize data not at file scope, i.e. within a function,
  * as gcc otherwise puts the data into the bss section and not into the init