Tony Lindgren 2e5df19fc0 pstore-ram: Allow optional mapping with pgprot_noncached ... commit 027bc8b082 upstream. On some ARMs the memory can be mapped pgprot_noncached() and still be working for atomic operations. As pointed out by Colin Cross <ccross@android.com>, in some cases you do want to use pgprot_noncached() if the SoC supports it to see a debug printk just before a write hanging the system. On ARMs, the atomic operations on strongly ordered memory are implementation defined. So let's provide an optional kernel parameter for configuring pgprot_noncached(), and use pgprot_writecombine() by default. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Rob Herring <robherring2@gmail.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Anton Vorontsov <anton@enomsg.org> Cc: Colin Cross <ccross@android.com> Cc: Olof Johansson <olof@lixom.net> Cc: Russell King <linux@arm.linux.org.uk> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-01-16 06:59:30 -08:00
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Kconfig	pstore/Kconfig: Select ZLIB_DEFLATE and ZLIB_INFLATE when PSTORE is selected	2013-08-19 10:18:10 -07:00
Makefile	pstore: Add persistent function tracing	2012-07-17 10:05:52 -07:00
ftrace.c	pstore: Add hsize argument in write_buf call of pstore_ftrace_call	2013-07-02 18:39:37 +10:00
inode.c	pstore: Fix duplicate {console,ftrace}-efi entries	2014-11-14 08:59:50 -08:00
internal.h	pstore: Add file extension to pstore file if compressed	2013-08-19 11:53:27 -07:00
platform.c	pstore: Don't allow high traffic options on fragile devices	2013-12-20 13:12:01 -08:00
ram.c	pstore-ram: Allow optional mapping with pgprot_noncached	2015-01-16 06:59:30 -08:00
ram_core.c	pstore-ram: Allow optional mapping with pgprot_noncached	2015-01-16 06:59:30 -08:00