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authorPekka Enberg <penberg@cs.helsinki.fi>2009-03-04 04:46:40 -0500
committerIngo Molnar <mingo@elte.hu>2009-03-04 05:40:04 -0500
commit540aca06b737cc38965b52eeceefba3d24376461 (patch)
tree0231f664033a2f3ad7632e4030e54a6b7a848447 /arch/x86/mm/init_32.c
parent8b0e5860cb099d7958d13b00ffbc35ad02735700 (diff)
x86: move devmem_is_allowed() to common mm/init.c
Impact: cleanup The function is identical on 32-bit and 64-bit configurations so move it to the common mm/init.c file. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> LKML-Reference: <1236160001.29024.29.camel@penberg-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm/init_32.c')
-rw-r--r--arch/x86/mm/init_32.c21
1 files changed, 0 insertions, 21 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 0b087dcd2c18..917c4e60c767 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -354,27 +354,6 @@ repeat:
354 } 354 }
355} 355}
356 356
357/*
358 * devmem_is_allowed() checks to see if /dev/mem access to a certain address
359 * is valid. The argument is a physical page number.
360 *
361 *
362 * On x86, access has to be given to the first megabyte of ram because that area
363 * contains bios code and data regions used by X and dosemu and similar apps.
364 * Access has to be given to non-kernel-ram areas as well, these contain the PCI
365 * mmio resources as well as potential bios/acpi data regions.
366 */
367int devmem_is_allowed(unsigned long pagenr)
368{
369 if (pagenr <= 256)
370 return 1;
371 if (iomem_is_exclusive(pagenr << PAGE_SHIFT))
372 return 0;
373 if (!page_is_ram(pagenr))
374 return 1;
375 return 0;
376}
377
378pte_t *kmap_pte; 357pte_t *kmap_pte;
379pgprot_t kmap_prot; 358pgprot_t kmap_prot;
380 359