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104ad3b32d
linux/arch/arm
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Catalin Marinas 104ad3b32d arm: set the page table freeing ceiling to TASK_SIZE 
ARM processors with LPAE enabled use 3 levels of page tables, with an
entry in the top level (pgd) covering 1GB of virtual space.  Because of
the branch relocation limitations on ARM, the loadable modules are
mapped 16MB below PAGE_OFFSET, making the corresponding 1GB pgd shared
between kernel modules and user space.

If free_pgtables() is called with the default ceiling 0,
free_pgd_range() (and subsequently called functions) also frees the page
table shared between user space and kernel modules (which is normally
handled by the ARM-specific pgd_free() function).  This patch changes
defines the ARM USER_PGTABLES_CEILING to TASK_SIZE when CONFIG_ARM_LPAE
is enabled.

Note that the pgd_free() function already checks the presence of the
shared pmd page allocated by pgd_alloc() and frees it, though with
ceiling 0 this wasn't necessary.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org>	[3.3+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29 15:54:34 -07:00
..
boot Char / Misc driver update for 3.10-rc1 2013-04-29 11:18:34 -07:00
common
configs USB: OMAP: ISP1301 needs USB_PHY 2013-04-25 10:58:00 -07:00
crypto
include arm: set the page table freeing ceiling to TASK_SIZE 2013-04-29 15:54:34 -07:00
kernel ARM: 7699/1: sched_clock: Add more notrace to prevent recursion 2013-04-19 22:23:55 +01:00
kvm ARM: KVM: fix unbalanced get_cpu() in access_dcsw 2013-04-17 12:51:32 -07:00
lib ARM: 7685/1: delay: use private ticks_per_jiffy field for timer-based delay ops 2013-04-03 16:45:50 +01:00
mach-at91 arm-soc: bug fixes for 3.9-rc3 2013-03-18 08:17:14 -07:00
mach-bcm
mach-bcm2835 arm-soc: soc-specific updates 2013-02-21 15:27:22 -08:00
mach-clps711x
mach-cns3xxx ARM: cns3xxx: fix mapping of private memory region 2013-03-30 12:05:26 -07:00
mach-davinci ARM: davinci: edma: fix dmaengine induced null pointer dereference on da830 2013-03-12 17:10:46 +05:30
mach-dove arm-soc: mvebu platform changes 2013-02-28 20:09:24 -08:00
mach-ebsa110
mach-ep93xx ARM: ep93xx: Fix wait for UART FIFO to be empty 2013-03-18 09:40:38 +11:00
mach-exynos usb: exynos: do not include plat/usb-phy.h 2013-04-11 14:27:55 -07:00
mach-footbridge ARM: fix CONFIG_VIRT_TO_BUS handling 2013-03-18 13:49:57 +00:00
mach-gemini
mach-h720x
mach-highbank ARM: highbank: fix cache flush ordering for cpu hotplug 2013-04-18 09:37:46 -07:00
mach-imx ARM i.MX6: Fix ldb_di clock selection 2013-04-09 19:48:09 +08:00
mach-integrator Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-iop13xx Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-iop32x
mach-iop33x
mach-ixp4xx ARM: w1-gpio: fix erroneous gpio requests 2013-03-12 16:20:45 -07:00
mach-kirkwood Fix GE0/GE1 init on ix2-200 as GE0 has no PHY 2013-04-10 16:50:58 +00:00
mach-ks8695 Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-l7200/include/mach
mach-lpc32xx
mach-mmp usb: patches for v3.10 merge window 2013-04-05 15:18:00 -07:00
mach-msm ARM: msm: Stop counting before reprogramming clockevent 2013-03-22 10:45:39 -07:00
mach-mv78xx0 Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-mvebu arm: mvebu: Fix the irq map function in SMP mode 2013-04-10 16:59:14 +00:00
mach-mxs ARM: video: mxs: Fix mxsfb misconfiguring VDCTRL0 2013-03-19 11:07:58 +08:00
mach-netx ARM: 7642/1: netx: bump IRQ offset to 64 2013-03-03 22:54:11 +00:00
mach-nomadik Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-omap1 Miscellaneous OMAP fixes for v3.9-rc. These primarily deal with OMAP2+ power 2013-03-19 11:20:16 -07:00
mach-omap2 ARM: OMAP4: hwmod data: make 'ocp2scp_usb_phy_phy_48m" as the main clock 2013-04-10 13:26:07 -07:00
mach-orion5x Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-picoxcell
mach-prima2 Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-pxa ARM: w1-gpio: fix erroneous gpio requests 2013-03-12 16:20:45 -07:00
mach-realview arm-soc: cleanups 2013-02-21 14:58:40 -08:00
mach-rpc
mach-s3c24xx Merge 3.9-rc7 intp tty-next 2013-04-14 19:13:28 -07:00
mach-s3c64xx usb: exynos: do not include plat/usb-phy.h 2013-04-11 14:27:55 -07:00
mach-s5p64x0 arm-soc: cleanups 2013-02-21 14:58:40 -08:00
mach-s5pc100
mach-s5pv210 usb: exynos: do not include plat/usb-phy.h 2013-04-11 14:27:55 -07:00
mach-sa1100 Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-shark
mach-shmobile usb: patches for v3.10 merge window 2013-04-05 15:18:00 -07:00
mach-socfpga Merge branch 'socfpga/hw' into next/soc 2013-02-11 19:37:51 -08:00
mach-spear3xx ARM: spear3xx: Use correct pl080 header file 2013-03-12 10:56:32 +01:00
mach-spear6xx Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2013-02-26 09:24:48 -08:00
mach-spear13xx Revert "ARM: SPEAr13xx: Pass DW DMAC platform data from DT" 2013-02-20 15:48:02 +05:30
mach-sunxi Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-tegra arm: tegra: fix Kconfig select clauses 2013-03-20 19:56:21 +02:00
mach-u300 Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-ux500 ARM: ux500: Enable the clock controlling Ethernet on Snowball 2013-03-27 20:20:40 +01:00
mach-versatile Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-vexpress Merge branch 'timer/cleanup' into late/mvebu2 2013-02-28 18:54:15 +01:00
mach-virt ARM: mach-virt: fixup machine descriptor after removal of sys_timer 2013-02-11 10:39:30 -08:00
mach-vt8500 arm-soc: soc-specific updates 2013-02-21 15:27:22 -08:00
mach-w90x900 arm-soc: cleanups 2013-02-21 14:58:40 -08:00
mach-zynq
mm mm/ARM: use free_highmem_page() to free highmem pages into buddy system 2013-04-29 15:54:31 -07:00
net ARM:net: an issue for k which is u32, never < 0 2013-03-12 11:33:05 -04:00
nwfpe
oprofile
plat-iop
plat-omap arm-soc: late OMAP changes 2013-02-28 20:00:40 -08:00
plat-orion arm: plat-orion: fix address decoding when > 4GB is used 2013-03-08 22:07:19 +00:00
plat-pxa
plat-samsung USB patches for 3.10-rc1 2013-04-29 12:19:23 -07:00
plat-spear ARM: SPEAr13xx: Fix typo "ARCH_HAVE_CPUFREQ" 2013-03-05 23:30:24 +01:00
plat-versatile Merge branch 'for-arm-soc/arch-timers' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into kvm-arm/timer 2013-02-11 19:03:52 +00:00
tools
vfp ARM: Fix broken commit 0cc41e4a21 corrupting kernel messages 2013-03-01 21:09:59 +00:00
xen xen: implement updated XENMEM_add_to_physmap_range ABI 2013-02-19 22:01:55 -05:00
Kconfig USB: remove USB_EHCI_BIG_ENDIAN_{DESC,MMIO} depends on architecture symbol 2013-04-09 16:57:44 -07:00
Kconfig-nommu
Kconfig.debug ARM: imx: add dependency check for DEBUG_IMX_UART_PORT 2013-03-19 13:56:05 +08:00
Makefile arm-soc: virtualization changes 2013-02-21 15:40:16 -08:00