linux/arch
Jan Beulich 1796316a8b x86: consolidate __swp_XXX() macros
Impact: cleanup, code robustization

The __swp_...() macros silently relied upon which bits are used for
_PAGE_FILE and _PAGE_PROTNONE. After having changed _PAGE_PROTNONE in
our Xen kernel to no longer overlap _PAGE_PAT, live locks and crashes
were reported that could have been avoided if these macros properly
used the symbolic constants. Since, as pointed out earlier, for Xen
Dom0 support mainline likewise will need to eliminate the conflict
between _PAGE_PAT and _PAGE_PROTNONE, this patch does all the necessary
adjustments, plus it introduces a mechanism to check consistency
between MAX_SWAPFILES_SHIFT and the actual encoding macros.

This also fixes a latent bug in that x86-64 used a 6-bit mask in
__swp_type(), and if MAX_SWAPFILES_SHIFT was increased beyond 5 in (the
seemingly unrelated) linux/swap.h, this would have resulted in a
collision with _PAGE_FILE.

Non-PAE 32-bit code gets similarly adjusted for its pte_to_pgoff() and
pgoff_to_pte() calculations.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-16 18:34:51 +01:00
..
alpha alpha: pcibios_resource_to_bus() is callable from normal code 2008-11-30 10:03:37 -08:00
arm Merge master.kernel.org:/home/rmk/linux-2.6-arm 2008-12-09 08:29:31 -08:00
avr32 Merge branches 'boards' and 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6 2008-10-23 15:24:10 +02:00
blackfin Blackfin arch: fix a broken define in dma-mapping 2008-11-18 17:48:22 +08:00
cris [CRIS] Remove links from CRIS build 2008-10-31 23:37:57 +01:00
frv frv: fix mmap2 error handling 2008-12-01 19:55:24 -08:00
h8300 Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/dvrabel/uwb 2008-10-23 08:20:34 -07:00
ia64 [IA64] SN: prevent IRQ retargetting in request_irq() 2008-12-09 10:57:18 -08:00
m32r m32r: section noise in head.S 2008-11-30 10:03:37 -08:00
m68k m68k: Update defconfigs for 2.6.28-rc7 2008-12-02 20:58:26 +01:00
m68knommu container freezer: implement freezer cgroup subsystem 2008-10-20 08:52:34 -07:00
mips Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus 2008-12-10 10:03:55 -08:00
mn10300 MN10300: Give correct size when reserving interrupt vector table 2008-12-10 13:34:33 -08:00
parisc Merge git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6 2008-11-30 14:04:31 -08:00
powerpc Merge branch 'merge' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into merge 2008-12-09 14:58:37 +11:00
s390 Merge branch 'kvm-updates/2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm 2008-12-02 15:56:17 -08:00
sh serial: sh-sci: Reorder the SCxTDR write after the TDxE clear. 2008-11-13 17:46:06 +09:00
sparc sparc: asm/bitops.h should define __fls 2008-12-03 16:04:52 -08:00
sparc64 sparc64: Sync FPU state in VIS emulation handler. 2008-12-04 09:12:57 -08:00
um uml: boot broken due to buffer overrun 2008-12-10 08:01:52 -08:00
x86 x86: consolidate __swp_XXX() macros 2008-12-16 18:34:51 +01:00
xtensa Merge git://git.kernel.org/pub/scm/linux/kernel/git/czankel/xtensa-2.6 2008-10-23 09:16:56 -07:00
.gitignore
Kconfig remove __ARCH_WANT_COMPAT_SYS_PTRACE 2008-11-30 11:00:15 -08:00