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Subject[PATCH 45/50] x86/boot/e820: Document e820__reserve_setup_data()
Date
Also clean it up a bit.

No change in functionality.

Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/x86/include/asm/e820/api.h | 4 ++--
arch/x86/kernel/e820.c | 11 +++++++++--
arch/x86/kernel/setup.c | 3 +--
3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/arch/x86/include/asm/e820/api.h b/arch/x86/include/asm/e820/api.h
index 7d5dfc2f9e91..fae7f3e11d9a 100644
--- a/arch/x86/include/asm/e820/api.h
+++ b/arch/x86/include/asm/e820/api.h
@@ -22,10 +22,10 @@ extern void e820__update_table_print(void);
extern unsigned long e820_end_of_ram_pfn(void);
extern unsigned long e820_end_of_low_ram_pfn(void);

-extern u64 e820__memblock_alloc_reserved(u64 sizet, u64 align);
+extern u64 e820__memblock_alloc_reserved(u64 size, u64 align);
extern void e820__memblock_setup(void);

-extern void e820_reserve_setup_data(void);
+extern void e820__reserve_setup_data(void);
extern void e820__finish_early_params(void);
extern void e820_reserve_resources(void);
extern void e820_reserve_resources_late(void);
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 7dc430c03acb..114625890337 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -922,7 +922,12 @@ static int __init parse_memmap_opt(char *str)
}
early_param("memmap", parse_memmap_opt);

-void __init e820_reserve_setup_data(void)
+/*
+ * Reserve all entries from the bootloader's extensible data nodes list,
+ * because if present we are going to use it later on to fetch e820
+ * entries from it:
+ */
+void __init e820__reserve_setup_data(void)
{
struct setup_data *data;
u64 pa_data;
@@ -939,8 +944,10 @@ void __init e820_reserve_setup_data(void)
}

e820__update_table(e820_table);
+
memcpy(e820_table_firmware, e820_table, sizeof(*e820_table_firmware));
- printk(KERN_INFO "extended physical RAM map:\n");
+
+ pr_info("extended physical RAM map:\n");
e820__print_table("reserve setup_data");
}

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index acb2db02ec81..4ac8ae8a7573 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1003,8 +1003,7 @@ void __init setup_arch(char **cmdline_p)
early_dump_pci_devices();
#endif

- /* update the e820_table_firmware too */
- e820_reserve_setup_data();
+ e820__reserve_setup_data();
e820__finish_early_params();

if (efi_enabled(EFI_BOOT))
--
2.7.4
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