Roland Dreier dbee8a0aff x86: remove 32-bit versions of readq()/writeq() ... The presense of a writeq() implementation on 32-bit x86 that splits the 64-bit write into two 32-bit writes turns out to break the mpt2sas driver (and in general is risky for drivers as was discussed in <http://lkml.kernel.org/r/adaab6c1h7c.fsf@cisco.com>). To fix this, revert 2c5643b1c5 ("x86: provide readq()/writeq() on 32-bit too") and follow-on cleanups. This unfortunately leads to pushing non-atomic definitions of readq() and write() to various x86-only drivers that in the meantime started using the definitions in the x86 version of <asm/io.h>. However as discussed exhaustively, this is actually the right thing to do, because the right way to split a 64-bit transaction is hardware dependent and therefore belongs in the hardware driver (eg mpt2sas needs a spinlock to make sure no other accesses occur in between the two halves of the access). Build tested on 32- and 64-bit x86 allmodconfig. Link: http://lkml.kernel.org/r/x86-32-writeq-is-broken@mdm.bga.com Acked-by: Hitoshi Mitake <h.mitake@gmail.com> Cc: Kashyap Desai <Kashyap.Desai@lsi.com> Cc: Len Brown <lenb@kernel.org> Cc: Ravi Anand <ravi.anand@qlogic.com> Cc: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Cc: Matthew Garrett <mjg@redhat.com> Cc: Jason Uhlenkott <juhlenko@akamai.com> Acked-by: James Bottomley <James.Bottomley@parallels.com> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2011-05-25 08:39:44 -07:00
..
apei-base.c	ACPI, APEI, Fix error path for memory allocation	2010-09-29 14:02:35 -04:00
apei-internal.h	ACPI, APEI, Add APEI generic error status printing support	2010-12-13 23:42:12 -05:00
cper.c	ACPI, APEI, Add PCIe AER error information printing support	2011-03-21 22:59:08 -04:00
einj.c	x86: remove 32-bit versions of readq()/writeq()	2011-05-25 08:39:44 -07:00
erst-dbg.c	ACPI, APEI, Add ERST record ID cache	2011-03-21 22:59:06 -04:00
erst.c	pstore: fix potential logic issue in pstore read interface	2011-05-16 11:05:08 -07:00
ghes.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
hest.c	ACPI: Fix boot problem related to APEI with acpi_disabled set	2011-01-16 11:56:26 -08:00
Kconfig	pstore: Fix Kconfig dependencies for apei->pstore	2011-05-20 10:34:35 -07:00
Makefile	ACPI, APEI, ERST debug support	2010-08-14 22:47:55 -04:00