linux - linux

	Commit message (Collapse)	Author	Age	Files	Lines
*	parisc: Clean up fixup routines for get_user()/put_user()	Helge Deller	2017-03-29	1	-98/+0
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	Al Viro noticed that userspace accesses via get_user()/put_user() can be simplified a lot with regard to usage of the exception handling. This patch implements a fixup routine for get_user() and put_user() in such that the exception handler will automatically load -EFAULT into the register %r8 (the error value) in case on a fault on userspace. Additionally the fixup routine will zero the target register on fault in case of a get_user() call. The target register is extracted out of the faulting assembly instruction. This patch brings a few benefits over the old implementation: 1. Exception handling gets much cleaner, easier and smaller in size. 2. Helper functions like fixup_get_user_skip_1 (all of fixup.S) can be dropped. 3. No need to hardcode %r9 as target register for get_user() any longer. This helps the compiler register allocator and thus creates less assembler statements. 4. No dependency on the exception_data contents any longer. 5. Nested faults will be handled cleanly. Reported-by: Al Viro <viro@ZenIV.linux.org.uk> Cc: <stable@vger.kernel.org> # v4.9+ Signed-off-by: Helge Deller <deller@gmx.de>
*	parisc: Add cfi_startproc and cfi_endproc to assembly code	Helge Deller	2016-10-05	1	-8/+8
\| \| \| \| \| \| \|	Add ENTRY_CFI() and ENDPROC_CFI() macros for dwarf debug info and convert assembly users to new macros. Signed-off-by: Helge Deller <deller@gmx.de>
*	parisc: Unbreak handling exceptions from kernel modules	Helge Deller	2016-04-08	1	-0/+6
\| \| \| \| \| \| \| \| \| \| \| \| \| \|	Handling exceptions from modules never worked on parisc. It was just masked by the fact that exceptions from modules don't happen during normal use. When a module triggers an exception in get_user() we need to load the main kernel dp value before accessing the exception_data structure, and afterwards restore the original dp value of the module on exit. Noticed-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Helge Deller <deller@gmx.de> Cc: stable@vger.kernel.org
*	parisc: percpu: update comments referring to __get_cpu_var	Christoph Lameter	2014-12-13	1	-2/+2
\| \| \| \| \| \| \| \| \| \| \|	__get_cpu_var was removed. Update comments to refer to this_cpu_ptr() instead. Signed-off-by: Christoph Lameter <cl@linux.com> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
*	percpu: remove per_cpu__ prefix.	Rusty Russell	2009-10-29	1	-4/+4
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	Now that the return from alloc_percpu is compatible with the address of per-cpu vars, it makes sense to hand around the address of per-cpu variables. To make this sane, we remove the per_cpu__ prefix we used created to stop people accidentally using these vars directly. Now we have sparse, we can use that (next patch). tj: * Updated to convert stuff which were missed by or added after the original patch. * Kill per_cpu_var() macro. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Christoph Lameter <cl@linux-foundation.org>
*	Revert "parisc: fix trivial section name warnings"	Kyle McMartin	2008-06-13	1	-2/+1
\| \| \| \| \| \|	This reverts commit bd3bb8c15b9a80dbddfb7905b237a4a11a4725b4. Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
*	parisc: fix trivial section name warnings	Helge Deller	2008-05-15	1	-1/+2
\| \| \| \| \| \| \| \| \| \| \| \|	This trivial patch fixes the following section warnings on PARISC: > WARNING: vmlinux.o (.text.1): unexpected section name. >The (.[number]+) following section name are ld generated and not expected. > Did you forget to use "ax"/"aw" in a .S file? > Note that for example <linux/init.h> contains > section definitions for use in .S files. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
*	[PARISC] add ASM_EXCEPTIONTABLE_ENTRY() macro	Helge Deller	2007-02-17	1	-9/+11
\| \| \| \| \| \| \| \|	- this macro unifies the code to add exception table entries - additionally use ENTRY()/ENDPROC() at more places Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
*	Remove obsolete #include <linux/config.h>	Jörn Engel	2006-06-30	1	-1/+0
\| \| \| \| \|	Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
*	[PARISC] Specify level to fix binutils level promotion bug	Grant Grundler	2005-10-22	1	-1/+3
\| \| \| \| \| \| \| \| \| \| \| \|	fixup.S needs to specify .level and use correct LDREG macro. New binutils has a bug where it doesn't "promote" from PA1.0 to PA1.1 correctly when using ",s" completer. remove use of __LP64__ in assembly.h and add some white space. Signed-off-by: Grant Grundler <grundler@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
*	kbuild: m68k,parisc,ppc,ppc64,s390,xtensa use generic asm-offsets.h support	Sam Ravnborg	2005-09-09	1	-1/+1
\| \| \| \| \| \|	Delete obsoleted parts form arch makefiles and rename to asm-offsets.h Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
*	Linux-2.6.12-rc2v2.6.12-rc2	Linus Torvalds	2005-04-17	1	-0/+89
	Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!