linux-kernel - [PATCH 3/8] x86 boot: x86_64 efi compiler warning fix

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Message-Id: <20080616062956.14597.10460.sendpatchset@polaris-admin.engr.sgi.com>
Date:	Sun, 15 Jun 2008 23:29:56 -0700
From:	Paul Jackson <pj@....com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Thomas Gleixner" <tglx@...utronix.de>,
	"Yinghai Lu" <yhlu.kernel@...il.com>,
	"Jack Steiner" <steiner@....com>, "Mike Travis" <travis@....com>,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
	"Huang, Ying" <ying.huang@...el.com>,
	"Andi Kleen" <andi@...stfloor.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	Paul Jackson <pj@....com>
Subject: [PATCH 3/8] x86 boot: x86_64 efi compiler warning fix

From: Paul Jackson <pj@....com>

Fix a compiler warning.  Rather than always casting a u32 to a pointer
(which generates a warning on x86_64 systems) instead separate the
x86_32 and x86_64 assignments entirely with ifdefs.  Until other recent
changes to this code, it used to have x86_64 separated like this.

Signed-off-by: Paul Jackson <pj@....com>

---
 arch/x86/kernel/efi.c |   14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

--- linux.orig/arch/x86/kernel/efi.c	2008-06-12 17:18:57.000000000 -0700
+++ linux/arch/x86/kernel/efi.c	2008-06-12 17:32:14.984928792 -0700
@@ -242,9 +242,11 @@ void __init efi_reserve_early(void)
 {
 	unsigned long pmap;
 
+#ifdef CONFIG_X86_32
 	pmap = boot_params.efi_info.efi_memmap;
-#ifdef CONFIG_X86_64
-	pmap += (__u64)boot_params.efi_info.efi_memmap_hi << 32;
+#else
+	pmap = (boot_params.efi_info.efi_memmap |
+		((__u64)boot_params.efi_info.efi_memmap_hi<<32));
 #endif
 	memmap.phys_map = (void *)pmap;
 	memmap.nr_map = boot_params.efi_info.efi_memmap_size /
@@ -284,10 +286,12 @@ void __init efi_init(void)
 	int i = 0;
 	void *tmp;
 
+#ifdef CONFIG_X86_32
 	efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab;
-#ifdef CONFIG_X86_64
-	efi_phys.systab = (void *)efi_phys.systab +
-		((__u64)boot_params.efi_info.efi_systab_hi<<32);
+#else
+	efi_phys.systab = (efi_system_table_t *)
+		(boot_params.efi_info.efi_systab |
+		 ((__u64)boot_params.efi_info.efi_systab_hi<<32));
 #endif
 
 	efi.systab = early_ioremap((unsigned long)efi_phys.systab,

-- 
                          I won't rest till it's the best ...
                          Programmer, Linux Scalability
                          Paul Jackson <pj@....com> 1.650.933.1373
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