linux/arch/sh
Stas Sergeev caac7e6d00 sh: get_user_pages_fast() must flush cache
This patch avoids fuse hangs on sh4 by flushing the cache on
get_user_pages_fast().  This is not necessary a good thing to do, but
get_user_pages() does this, so get_user_pages_fast() should too.

Please note the patch for mips arch that addresses the similar problem:
  https://kernel.googlesource.com/pub/scm/linux/kernel/git/ralf/linux/+/linux-3.4.50%5E!/#F0

They basically simply disable get_user_pages_fast() at all, using a
fall-back to get_user_pages().  But my fix is different, it adds an
explicit cache flushes.

Signed-off-by: Stas Sergeev <stsp@users.sourceforge.net>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Kamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-09-10 15:42:12 -07:00
..
boards Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-08-06 21:03:53 -07:00
boot Kbuild: centralize MKIMAGE and cmd_uimage definitions 2012-03-26 15:49:20 +02:00
cchips sh: hd64461: Migrate off of deprecated dynamic IRQ API. 2012-05-18 23:20:09 +09:00
configs tgt: defconfig cleanup 2014-07-17 22:07:44 +02:00
drivers Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2014-08-11 07:14:01 -07:00
include Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2014-08-11 07:14:01 -07:00
kernel Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2014-08-11 07:14:01 -07:00
lib sh: ftrace: Remove check of obsolete variable function_trace_stop 2014-07-18 13:57:04 -04:00
lib64 sh64: Kill off old exception debugging helpers. 2012-06-14 14:12:18 +09:00
math-emu sh: remove unused do_fpu_error 2014-04-03 16:20:52 -07:00
mm sh: get_user_pages_fast() must flush cache 2014-09-10 15:42:12 -07:00
oprofile oprofile, arm/sh: Fix oprofile_arch_exit() linkage issue 2011-12-23 11:58:34 +01:00
tools sh: Add RSK2+SH7269 board 2012-05-10 17:20:01 +09:00
Kconfig kexec: remove CONFIG_KEXEC dependency on crypto 2014-08-29 16:28:16 -07:00
Kconfig.cpu arch/sh: remove depends on CONFIG_EXPERIMENTAL 2013-01-21 14:43:13 -08:00
Kconfig.debug sh: dwarf unwinder depends on SHcompact. 2012-03-30 19:31:22 +09:00
Makefile sh: also try passing -m4-nofpu for SH2A builds 2014-07-23 15:10:54 -07:00