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Andrew Morton 0ab32b6f1b uaccess: reimplement probe_kernel_address() using probe_kernel_read() 
probe_kernel_address() is basically the same as the (later added)
probe_kernel_read().

The return value on EFAULT is a bit different: probe_kernel_address()
returns number-of-bytes-not-copied whereas probe_kernel_read() returns
-EFAULT.  All callers have been checked, none cared.

probe_kernel_read() can be overridden by the architecture whereas
probe_kernel_address() cannot.  parisc, blackfin and um do this, to insert
additional checking.  Hence this patch possibly fixes obscure bugs,
although there are only two probe_kernel_address() callsites outside
arch/.

My first attempt involved removing probe_kernel_address() entirely and
converting all callsites to use probe_kernel_read() directly, but that got
tiresome.

This patch shrinks mm/slab_common.o by 218 bytes.  For a single
probe_kernel_address() callsite.

Cc: Steven Miao <realmz6@gmail.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2015-11-05 19:34:48 -08:00
..
boot char/misc drivers for 4.4-rc1 2015-11-04 22:15:15 -08:00
common genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
configs arm: lpc18xx_defconfig: remove CONFIG_MMC_DW_IDMAC 2015-10-26 16:00:19 +01:00
crypto
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firmware
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include xen: features for 4.4-rc0 2015-11-04 17:32:42 -08:00
kernel Power management and ACPI updates for v4.4-rc1 2015-11-04 18:10:13 -08:00
kvm KVM: arm: use GIC support unconditionally 2015-10-20 18:04:49 +02:00
lib ARM: 8438/1: Add unwinding to __clear_user_std() 2015-10-03 16:36:45 +01:00
mach-alpine
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mach-asm9260
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mach-at91 genalloc: add name arg to gen_pool_get() and devm_gen_pool_create() 2015-09-04 16:54:41 -07:00
mach-axxia
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mach-bcm
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mach-berlin
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mach-clps711x libnvdimm for 4.3: 2015-09-08 14:35:59 -07:00
mach-cns3xxx
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mach-davinci
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mach-digicolor
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mach-dove genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-ebsa110
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mach-efm32
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mach-ep93xx
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mach-exynos Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-11-03 14:40:01 -08:00
mach-footbridge genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-gemini ARM: gemini: remove unnecessary mdio-gpio includes 2015-10-21 19:50:43 -07:00
mach-highbank
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mach-hisi
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mach-imx Power management and ACPI updates for v4.4-rc1 2015-11-04 18:10:13 -08:00
mach-integrator
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mach-iop13xx genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-iop32x
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mach-iop33x
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mach-ixp4xx
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mach-keystone
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mach-ks8695
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mach-lpc18xx
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mach-lpc32xx genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-mediatek
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mach-meson
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mach-mmp ARM: mmp: remove unused RTC register definitions 2015-09-05 19:37:17 +02:00
mach-moxart
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mach-mv78xx0
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mach-mvebu ARM: mvebu: remove static LED setup for netxbig boards 2015-11-03 08:59:30 +01:00
mach-mxs
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mach-netx genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-nomadik
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mach-nspire
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mach-omap1 genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-omap2 Power management and ACPI updates for v4.4-rc1 2015-11-04 18:10:13 -08:00
mach-orion5x
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mach-picoxcell
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mach-prima2 Merge branches 'cleanup', 'fixes', 'misc', 'omap-barrier' and 'uaccess' into for-linus 2015-09-03 15:28:37 +01:00
mach-pxa ARM: pxa: fix pxa3xx DFI lockup hack 2015-10-14 17:13:59 +02:00
mach-qcom
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mach-realview
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mach-rockchip clocksource: cosmetic: Drop OF 'dependency' from symbols 2015-10-01 02:18:39 +02:00
mach-rpc genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-s3c24xx genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-s3c64xx usb: dwc2: rename all s3c_* to dwc2_* 2015-09-27 10:54:31 -05:00
mach-s5pv210
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mach-sa1100 genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
mach-shmobile clocksource: cosmetic: Drop OF 'dependency' from symbols 2015-10-01 02:18:39 +02:00
mach-socfpga genalloc: add name arg to gen_pool_get() and devm_gen_pool_create() 2015-09-04 16:54:41 -07:00
mach-spear clocksource: cosmetic: Drop OF 'dependency' from symbols 2015-10-01 02:18:39 +02:00
mach-sti
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mach-stm32
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mach-sunxi clocksource: cosmetic: Drop OF 'dependency' from symbols 2015-10-01 02:18:39 +02:00
mach-tegra
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mach-u300 clocksource: cosmetic: Drop OF 'dependency' from symbols 2015-10-01 02:18:39 +02:00
mach-uniphier
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mach-ux500 clocksource: cosmetic: Drop OF 'dependency' from symbols 2015-10-01 02:18:39 +02:00
mach-versatile
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mach-vexpress
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mach-vt8500
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mach-w90x900
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mach-zx
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mach-zynq clocksource: cosmetic: Drop OF 'dependency' from symbols 2015-10-01 02:18:39 +02:00
mm uaccess: reimplement probe_kernel_address() using probe_kernel_read() 2015-11-05 19:34:48 -08:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-10-20 06:08:27 -07:00
nwfpe ARM: swpan: fix nwfpe for uaccess changes 2015-09-09 23:26:11 +01:00
oprofile
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plat-iop
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plat-omap
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plat-orion mvebu fixes for 4.3 (part 1) 2015-10-14 17:10:55 +02:00
plat-pxa ARM: pxa: ssp: Fix build error by removing originally incorrect DT binding 2015-09-13 12:55:27 +02:00
plat-samsung usb: dwc2: rename all s3c_* to dwc2_* 2015-09-27 10:54:31 -05:00
plat-versatile
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probes
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tools
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vdso ARM: 8449/1: fix bug in vdsomunge swab32 macro 2015-10-29 15:20:15 +00:00
vfp
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xen xen/arm: don't try to re-register vcpu_info on cpu_hotplug. 2015-10-23 14:20:48 +01:00
Kconfig Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-11-03 14:40:01 -08:00
Kconfig-nommu
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Kconfig.debug
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Makefile ARM: 8429/1: disable GCC SRA optimization 2015-09-07 13:24:05 +01:00