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mm: use vm_unmapped_area() on x86_64 architecture

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Update the x86_64 arch_get_unmapped_area[_topdown] functions to make use
of vm_unmapped_area() instead of implementing a brute force search.

Signed-off-by: Michel Lespinasse <walken@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Michel Lespinasse
2012-12-11 16:01:52 -08:00
committed by Linus Torvalds
parent db4fbfb952
commit f99024729e
3 changed files with 33 additions and 126 deletions
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6
arch/x86/include/asm/elf.h
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@@ -354,12 +354,10 @@ static inline int mmap_is_ia32(void)
return 0;
}
/* The first two values are special, do not change. See align_addr() */
/* Do not change the values. See get_align_mask() */
enum align_flags {
ALIGN_VA_32 = BIT(0),
ALIGN_VA_64 = BIT(1),
ALIGN_VDSO = BIT(2),
ALIGN_TOPDOWN = BIT(3),
};
struct va_alignment {
@@ -368,5 +366,5 @@ struct va_alignment {
} ____cacheline_aligned;
extern struct va_alignment va_align;
extern unsigned long align_addr(unsigned long, struct file *, enum align_flags);
extern unsigned long align_vdso_addr(unsigned long);
#endif /* _ASM_X86_ELF_H */