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x86, setup: Let early_memremap() handle page alignment

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early_memremap() takes care of page alignment and map size, so we can
just remap the required data size and get rid of the adjustments in
the setup code.

[tglx: Massaged changelog ]

Signed-off-by: WANG Chao <chaowang@redhat.com>
Cc: Matt Fleming <matt.fleming@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Link: http://lkml.kernel.org/r/1420628150-16872-1-git-send-email-chaowang@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
WANG Chao 2015-01-07 18:55:48 +08:00 committed by Thomas Gleixner
parent ec6f34e5b5
commit 7389882c81
1 changed files with 3 additions and 5 deletions
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8
arch/x86/kernel/setup.c
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@ -431,15 +431,13 @@ static void __init parse_setup_data(void)
pa_data = boot_params.hdr.setup_data;
while (pa_data) {
u32 data_len, map_len, data_type;
u32 data_len, data_type;
map_len = max(PAGE_SIZE - (pa_data & ~PAGE_MASK),
(u64)sizeof(struct setup_data));
data = early_memremap(pa_data, map_len);
data = early_memremap(pa_data, sizeof(*data));
data_len = data->len + sizeof(struct setup_data);
data_type = data->type;
pa_next = data->next;
early_iounmap(data, map_len);
early_iounmap(data, sizeof(*data));
switch (data_type) {
case SETUP_E820_EXT: