Zhang, Yanmin 8f860591ff [PATCH] Enable mprotect on huge pages ... 2.6.16-rc3 uses hugetlb on-demand paging, but it doesn_t support hugetlb mprotect. From: David Gibson <david@gibson.dropbear.id.au> Remove a test from the mprotect() path which checks that the mprotect()ed range on a hugepage VMA is hugepage aligned (yes, really, the sense of is_aligned_hugepage_range() is the opposite of what you'd guess :-/). In fact, we don't need this test. If the given addresses match the beginning/end of a hugepage VMA they must already be suitably aligned. If they don't, then mprotect_fixup() will attempt to split the VMA. The very first test in split_vma() will check for a badly aligned address on a hugepage VMA and return -EINVAL if necessary. From: "Chen, Kenneth W" <kenneth.w.chen@intel.com> On i386 and x86-64, pte flag _PAGE_PSE collides with _PAGE_PROTNONE. The identify of hugetlb pte is lost when changing page protection via mprotect. A page fault occurs later will trigger a bug check in huge_pte_alloc(). The fix is to always make new pte a hugetlb pte and also to clean up legacy code where _PAGE_PRESENT is forced on in the pre-faulting day. Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com> Cc: David Gibson <david@gibson.dropbear.id.au> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: William Lee Irwin III <wli@holomorphy.com> Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-03-22 07:54:03 -08:00
..
acpi
asm-alpha
asm-arm	[ARM] Fix cosmetic typo in asm/irq.h	2006-03-20 10:12:31 +00:00
asm-arm26
asm-cris
asm-frv
asm-generic	[PATCH] add EXPORT_SYMBOL_GPL_FUTURE()	2006-03-20 13:42:58 -08:00
asm-h8300
asm-i386	[PATCH] Enable mprotect on huge pages	2006-03-22 07:54:03 -08:00
asm-ia64	[PATCH] Enable mprotect on huge pages	2006-03-22 07:54:03 -08:00
asm-m32r
asm-m68k	[PATCH] m68k: fix cmpxchg compile errors if CONFIG_RMW_INSNS=n	2006-03-09 19:47:38 -08:00
asm-m68knommu
asm-mips	Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6	2006-03-21 09:25:47 -08:00
asm-parisc
asm-powerpc	[PATCH] powerpc: properly configure DDR/P5IOC children devs	2006-03-16 16:55:07 +11:00
asm-ppc
asm-s390	[PATCH] mm: remove set_pgdir leftovers	2006-03-22 07:53:56 -08:00
asm-sh
asm-sh64	[PATCH] mm: remove set_pgdir leftovers	2006-03-22 07:53:56 -08:00
asm-sparc	[SPARC]: Fixup SO_PEERSEC value on 32-bit sparc.	2006-03-20 22:53:42 -08:00
asm-sparc64	[SPARC64]: Fix 2 bugs in huge page support.	2006-03-20 01:17:17 -08:00
asm-um
asm-v850
asm-x86_64	[PATCH] Enable mprotect on huge pages	2006-03-22 07:54:03 -08:00
asm-xtensa
keys
linux	[PATCH] Enable mprotect on huge pages	2006-03-22 07:54:03 -08:00
math-emu
media	V4L/DVB (3513): Remove saa711x driver	2006-03-21 08:53:40 -08:00
mtd
net	[LLC]: llc_mac_hdr_init const arguments	2006-03-20 22:59:36 -08:00
pcmcia
rdma	IB/umad: Add support for large RMPP transfers	2006-03-20 10:08:23 -08:00
rxrpc
scsi
sound
video