x86/boot/e820: Clean up the E820 table size define names

We've got a number of defines related to the E820 table and its size:

	E820MAP
	E820NR
	E820_X_MAX
	E820MAX

The first two denote byte offsets into the zeropage (struct boot_params),
and can are not used in the kernel and can be removed.

The E820_*_MAX values have an inconsistent structure and it's unclear in any
case what they mean. 'X' presuably goes for extended - but it's not very
expressive altogether.

Change these over to:

	E820_MAX_ENTRIES_ZEROPAGE
	E820_MAX_ENTRIES

... which are self-explanatory names.

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>

3 files changed, 8 insertions, 8 deletions

diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index 5feba9a21130..22217ece26c8 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -509,7 +509,7 @@ static int add_e820_entry(struct boot_params *params, struct e820_entry *entry)
 	unsigned int nr_e820_entries;
 
 	nr_e820_entries = params->e820_entries;
-	if (nr_e820_entries >= E820MAX)
+	if (nr_e820_entries >= E820_MAX_ENTRIES_ZEROPAGE)
 		return 1;
 
 	memcpy(&params->e820_table[nr_e820_entries], entry,
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 90dcd240a389..055ac2484729 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -261,10 +261,10 @@ static int __init cpcompare(const void *a, const void *b)
 
 int __init e820__update_table(struct e820_entry *biosmap, int max_nr_map, u32 *pnr_map)
 {
-	static struct change_member change_point_list[2*E820_X_MAX] __initdata;
-	static struct change_member *change_point[2*E820_X_MAX] __initdata;
-	static struct e820_entry *overlap_list[E820_X_MAX] __initdata;
-	static struct e820_entry new_bios[E820_X_MAX] __initdata;
+	static struct change_member change_point_list[2*E820_MAX_ENTRIES] __initdata;
+	static struct change_member *change_point[2*E820_MAX_ENTRIES] __initdata;
+	static struct e820_entry *overlap_list[E820_MAX_ENTRIES] __initdata;
+	static struct e820_entry new_bios[E820_MAX_ENTRIES] __initdata;
 	enum e820_type current_type, last_type;
 	unsigned long long last_addr;
 	int chgidx;
diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c
index 3e43a7d3b191..9d7fd5e6689a 100644
--- a/arch/x86/kernel/kexec-bzimage64.c
+++ b/arch/x86/kernel/kexec-bzimage64.c
@@ -102,9 +102,9 @@ static int setup_e820_entries(struct boot_params *params)
 
 	nr_e820_entries = e820_table_firmware->nr_entries;
 
-	/* TODO: Pass entries more than E820MAX in bootparams setup data */
-	if (nr_e820_entries > E820MAX)
-		nr_e820_entries = E820MAX;
+	/* TODO: Pass entries more than E820_MAX_ENTRIES_ZEROPAGE in bootparams setup data */
+	if (nr_e820_entries > E820_MAX_ENTRIES_ZEROPAGE)
+		nr_e820_entries = E820_MAX_ENTRIES_ZEROPAGE;
 
 	params->e820_entries = nr_e820_entries;
 	memcpy(&params->e820_table, &e820_table_firmware->entries, nr_e820_entries*sizeof(struct e820_entry));