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Subject[tip:x86/boot] x86/boot/setup: Clean up the e820_reserve_setup_data() code
Commit-ID:  f2af7d25b4aa5b01203cc76e7530ea7fd18864a0
Gitweb: http://git.kernel.org/tip/f2af7d25b4aa5b01203cc76e7530ea7fd18864a0
Author: Wei Yang <weiyang@linux.vnet.ibm.com>
AuthorDate: Thu, 4 Jun 2015 14:18:49 +0800
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Fri, 5 Jun 2015 13:53:22 +0200

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>
---
arch/x86/kernel/setup.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index d74ac33..c3992c3 100644
--- 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));

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