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x86, mm: Create symbolic index into address_markers array 

Without this, adding entries into the address_markers array means adding
more and more of an #ifdef maze in pt_dump_init().  By using indices, we
can keep it a bit saner.

Signed-off-by: Andres Salomon <dilinger@queued.net>
LKML-Reference: <201007202219.o6KMJkUs021052@imap1.linux-foundation.org>
Cc: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Andres Salomon 2010-07-20 15:19:46 -07:00 committed by H. Peter Anvin
parent 35be1b716a
commit 92851e2fca
1 changed files with 26 additions and 6 deletions
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32
arch/x86/mm/dump_pagetables.c
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@ -37,6 +37,28 @@ struct addr_marker {
const char *name;
};
/* indices for address_markers; keep sync'd w/ address_markers below */
enum address_markers_idx {
USER_SPACE_NR = 0,
#ifdef CONFIG_X86_64
KERNEL_SPACE_NR,
LOW_KERNEL_NR,
VMALLOC_START_NR,
VMEMMAP_START_NR,
HIGH_KERNEL_NR,
MODULES_VADDR_NR,
MODULES_END_NR,
#else
KERNEL_SPACE_NR,
VMALLOC_START_NR,
VMALLOC_END_NR,
# ifdef CONFIG_HIGHMEM
PKMAP_BASE_NR,
# endif
FIXADDR_START_NR,
#endif
};
/* Address space markers hints */
static struct addr_marker address_markers[] = {
{ 0, "User Space" },
@ -331,14 +353,12 @@ static int pt_dump_init(void)
#ifdef CONFIG_X86_32
/* Not a compile-time constant on x86-32 */
address_markers[2].start_address = VMALLOC_START;
address_markers[3].start_address = VMALLOC_END;
address_markers[VMALLOC_START_NR].start_address = VMALLOC_START;
address_markers[VMALLOC_END_NR].start_address = VMALLOC_END;
# ifdef CONFIG_HIGHMEM
address_markers[4].start_address = PKMAP_BASE;
address_markers[5].start_address = FIXADDR_START;
# else
address_markers[4].start_address = FIXADDR_START;
address_markers[PKMAP_BASE_NR].start_address = PKMAP_BASE;
# endif
address_markers[FIXADDR_START_NR].start_address = FIXADDR_START;
#endif
pe = debugfs_create_file("kernel_page_tables", 0600, NULL, NULL,