x86/boot/setup: Clean up the e820_reserve_setup_data() code

Deobfuscate the 'found' logic, it can be replaced with a simple:

	if (!pa_data)
		return;

and 'found' can be eliminated.

Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1433398729-8314-1-git-send-email-weiyang@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index d74ac33290ae3eeef46b923c4556d644b72f0d5a..c3992c3a4378c2ebe4dcfe601d8b07297f970394 100644 (file)
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -461,19 +461,18 @@ static void __init e820_reserve_setup_data(void)
 {
        struct setup_data *data;
        u64 pa_data;
-       int found = 0;
 
        pa_data = boot_params.hdr.setup_data;
+       if (!pa_data)
+               return;
+
        while (pa_data) {
                data = early_memremap(pa_data, sizeof(*data));
                e820_update_range(pa_data, sizeof(*data)+data->len,
                         E820_RAM, E820_RESERVED_KERN);
-               found = 1;
                pa_data = data->next;
                early_memunmap(data, sizeof(*data));
        }
-       if (!found)
-               return;
 
        sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
        memcpy(&e820_saved, &e820, sizeof(struct e820map));