e820_search_gap() is just used locally now and the start_addr and end_addr
is fixed. Also gapstart is not checked in this function.
The patch makes e820_search_gap() static and remove those unused variables.
Signed-off-by: Wei Yang <[email protected]>
---
arch/x86/include/asm/e820.h | 2 --
arch/x86/kernel/e820.c | 16 +++++-----------
2 files changed, 5 insertions(+), 13 deletions(-)
diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h
index 476b574..b95e6de 100644
--- a/arch/x86/include/asm/e820.h
+++ b/arch/x86/include/asm/e820.h
@@ -26,8 +26,6 @@ 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);
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index f4fb197..1deb18a 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -586,24 +586,19 @@ 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
@@ -634,9 +629,8 @@ __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) {
--
2.5.0
On Sun, Dec 25, 2016 at 02:35:51PM +0000, Wei Yang wrote:
> e820_search_gap() is just used locally now and the start_addr and end_addr
> is fixed. Also gapstart is not checked in this function.
>
> The patch makes e820_search_gap() static and remove those unused variables.
>
> Signed-off-by: Wei Yang <[email protected]>
Acked-by: Yinghai Lu <[email protected]>
Commit-ID: b4ed1d15b453c86b4b9362128bd7a0ecd95a105c
Gitweb: http://git.kernel.org/tip/b4ed1d15b453c86b4b9362128bd7a0ecd95a105c
Author: Wei Yang <[email protected]>
AuthorDate: Sun, 25 Dec 2016 14:35:51 +0000
Committer: Ingo Molnar <[email protected]>
CommitDate: Wed, 28 Dec 2016 09:20:29 +0100
x86/e820: Make e820_search_gap() static and remove unused variables
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 <[email protected]>
Acked-by: Yinghai Lu <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
---
arch/x86/include/asm/e820.h | 2 --
arch/x86/kernel/e820.c | 16 +++++-----------
2 files changed, 5 insertions(+), 13 deletions(-)
diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h
index ec23d8e..67313f3 100644
--- a/arch/x86/include/asm/e820.h
+++ b/arch/x86/include/asm/e820.h
@@ -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);
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 90e8dde..46f2afd 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -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) {