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x86, e820: Clean up sanitize_e820_map() users 

The argument 3 of sanitize_e820_map() will only be updated upon a
successful sanitization. Some of the callers have extra conditionals
for the same purpose. Clean them up.

default_machine_specific_memory_setup() must keep the extra
conditional because boot_params.e820_entries is an u8 and not an u32,
so the direct update would overwrite other fields in boot_params.

[ tglx: Massaged changelog ]

Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Lee Chun-Yi <joeyli.kernel@gmail.com>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Link: http://lkml.kernel.org/r/1420601859-18439-1-git-send-email-chaowang@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
WANG Chao 2015-01-07 11:37:38 +08:00 committed by Thomas Gleixner
parent 7389882c81
commit d574ffa106
1 changed files with 8 additions and 18 deletions
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26
arch/x86/kernel/e820.c
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@ -184,9 +184,9 @@ void __init e820_print_map(char *who)
* overwritten in the same location, starting at biosmap.
*
* The integer pointed to by pnr_map must be valid on entry (the
* current number of valid entries located at biosmap) and will
* be updated on return, with the new number of valid entries
* (something no more than max_nr_map.)
* current number of valid entries located at biosmap). If the
* sanitizing succeeds the *pnr_map will be updated with the new
* number of valid entries (something no more than max_nr_map).
*
* The return value from sanitize_e820_map() is zero if it
* successfully 'sanitized' the map entries passed in, and is -1
@ -561,23 +561,15 @@ u64 __init e820_remove_range(u64 start, u64 size, unsigned old_type,
void __init update_e820(void)
{
u32 nr_map;
nr_map = e820.nr_map;
if (sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &nr_map))
if (sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map))
return;
e820.nr_map = nr_map;
printk(KERN_INFO "e820: modified physical RAM map:\n");
e820_print_map("modified");
}
static void __init update_e820_saved(void)
{
u32 nr_map;
nr_map = e820_saved.nr_map;
if (sanitize_e820_map(e820_saved.map, ARRAY_SIZE(e820_saved.map), &nr_map))
return;
e820_saved.nr_map = nr_map;
sanitize_e820_map(e820_saved.map, ARRAY_SIZE(e820_saved.map),
&e820_saved.nr_map);
}
#define MAX_GAP_END 0x100000000ull
/*
@ -898,11 +890,9 @@ early_param("memmap", parse_memmap_opt);
void __init finish_e820_parsing(void)
{
if (userdef) {
u32 nr = e820.nr_map;
if (sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &nr) < 0)
if (sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map),
&e820.nr_map) < 0)
early_panic("Invalid user supplied memory map");
e820.nr_map = nr;
printk(KERN_INFO "e820: user-defined physical RAM map:\n");
e820_print_map("user");