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x86/e820: Make e820_search_gap() static and remove unused variables

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e820_search_gap() is just used locally now and the 'start_addr' and 'end_addr'
parameters are fixed values. Also, 'gapstart' is not checked in this function
anymore.

So make the function static and remove those unused variables.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
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: akataria@vmware.com
Link: http://lkml.kernel.org/r/1482676551-11411-1-git-send-email-richard.weiyang@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Wei Yang 2016-12-25 14:35:51 +00:00 committed by Ingo Molnar
parent 2d706e790f
commit b4ed1d15b4
2 changed files with 5 additions and 13 deletions
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2
arch/x86/include/asm/e820.h
View File

@ -30,8 +30,6 @@ extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type,
int checktype);
extern void update_e820(void);
extern void e820_setup_gap(void);
extern int e820_search_gap(unsigned long *gapstart, unsigned long *gapsize,
unsigned long start_addr, unsigned long long end_addr);
struct setup_data;
extern void parse_e820_ext(u64 phys_addr, u32 data_len);

16
arch/x86/kernel/e820.c
View File

@ -580,24 +580,19 @@ static void __init update_e820_saved(void)
}
#define MAX_GAP_END 0x100000000ull
/*
* Search for a gap in the e820 memory space from start_addr to end_addr.
* Search for a gap in the e820 memory space from 0 to MAX_GAP_END.
*/
__init int e820_search_gap(unsigned long *gapstart, unsigned long *gapsize,
unsigned long start_addr, unsigned long long end_addr)
static int __init e820_search_gap(unsigned long *gapstart,
unsigned long *gapsize)
{
unsigned long long last;
unsigned long long last = MAX_GAP_END;
int i = e820->nr_map;
int found = 0;
last = (end_addr && end_addr < MAX_GAP_END) ? end_addr : MAX_GAP_END;
while (--i >= 0) {
unsigned long long start = e820->map[i].addr;
unsigned long long end = start + e820->map[i].size;
if (end < start_addr)
continue;
/*
* Since "last" is at most 4GB, we know we'll
* fit in 32 bits if this condition is true
@ -628,9 +623,8 @@ __init void e820_setup_gap(void)
unsigned long gapstart, gapsize;
int found;
gapstart = 0x10000000;
gapsize = 0x400000;
found = e820_search_gap(&gapstart, &gapsize, 0, MAX_GAP_END);
found = e820_search_gap(&gapstart, &gapsize);
#ifdef CONFIG_X86_64
if (!found) {