linux-stable.git/arch/openrisc/kernel/entry.S, branch linux-4.9.y

openrisc: don't printk() unconditionally

2021-09-22T09:43:04+00:00

[ Upstream commit 946e1052cdcc7e585ee5d1e72528ca49fb295243 ]

Don't call printk() when CONFIG_PRINTK is not set.
Fixes the following build errors:

or1k-linux-ld: arch/openrisc/kernel/entry.o: in function `_external_irq_handler':
(.text+0x804): undefined reference to `printk'
(.text+0x804): relocation truncated to fit: R_OR1K_INSN_REL_26 against undefined symbol `printk'

Fixes: 9d02a4283e9c ("OpenRISC: Boot code")
Signed-off-by: Randy Dunlap 
Reported-by: kernel test robot 
Cc: Jonas Bonn 
Cc: Stefan Kristiansson 
Cc: Stafford Horne 
Cc: openrisc@lists.librecores.org
Signed-off-by: Stafford Horne 
Signed-off-by: Sasha Levin

openrisc: Fix issue with argument clobbering for clone/fork

2020-06-30T19:38:28+00:00

[ Upstream commit 6bd140e14d9aaa734ec37985b8b20a96c0ece948 ]

Working on the OpenRISC glibc port I found that sometimes clone was
working strange.  That the tls data argument sent in r7 was always
wrong.  Further investigation revealed that the arguments were getting
clobbered in the entry code.  This patch removes the code that writes to
the argument registers.  This was likely due to some old code hanging
around.

This patch fixes this up for clone and fork.  This fork clobber is
harmless but also useless so remove.

Signed-off-by: Stafford Horne 
Signed-off-by: Sasha Levin

openrisc: Fix broken paths to arch/or32

2019-12-05T14:34:41+00:00

[ Upstream commit 57ce8ba0fd3a95bf29ed741df1c52bd591bf43ff ]

OpenRISC was mainlined as "openrisc", not "or32".
vmlinux.lds is generated from vmlinux.lds.S.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Stafford Horne 
Signed-off-by: Sasha Levin

openrisc: Rework signal handling

2014-01-09T09:57:21+00:00

The mainline signal handling code for OpenRISC has been buggy since day
one with respect to syscall restart.  This patch significantly reworks
the signal handling code:

i)   Move the "work pending" loop to C code (borrowed from ARM arch)

ii)  Allow a tracer to muck about with the IP and skip syscall restart
     in that case (again, borrowed from ARM)

iii) Make signal handling WRT syscall restart actually work

v)   Make the signal handling code look more like that of other
     architectures so that it's easier for others to follow

Reported-by: Anders Nystrom 
Signed-off-by: Jonas Bonn

Merge branch 'for-upstream' of git://openrisc.net/jonas/linux

2013-02-27T03:46:23+00:00

Pull OpenRISC updates from Jonas Bonn:
 "An equal number of bug fixes and trivial cleanups; no new features.

   - Two patches to fix errors thrown by the updated toolchain.

   - Three other bug fixes.

   - Four trivial cleanups."

* 'for-upstream' of git://openrisc.net/jonas/linux:
  openrisc: add missing header inclusion
  openrisc: really pass correct arg to schedule_tail
  Add bitops include needed for ext2 filesystem
  openrisc: update DTLB-miss handler last
  openrisc: fix up vmalloc page table loading
  openrisc idle: delete pm_idle
  openrisc: remove CONFIG_SYMBOL_PREFIX
  openrisc: avoid using function parameter regs in reset vector
  openrisc: remove unused current_regs

openrisc: really pass correct arg to schedule_tail

2013-02-17T07:46:21+00:00

Commit 287ad220cd8b5a9d29f71c78f6e4051093f051fc tried to set up the argument
to schedule_tail, but ended up using TI_STACK which isn't a defined symbol.
Sadly, the old openrisc compiler silently ignores this fact and it was first
discovered now when building with an updated toolchain.

Reported-by: Christian Svensson 
Signed-off-by: Jonas Bonn

openrisc: fix up vmalloc page table loading

2013-02-14T15:39:26+00:00

vmalloc'ed pages are faulted into a process' page tables on demand.  In
order to facilitate this, do_page_fault needs to know whether it was
called via a page fault exception or a TLB-miss exception.

This patch adds a wrapper around the _x_page_fault_handler entry points
that the TLB-miss exceptions can call into in order to have the relevant
parameter set to satisfy do_page_fault.

This fixes a bug and is "good enough" for now.  That said, this whole
handling of vmalloc needs to be audited for correctness at some point.

Signed-off-by: Jonas Bonn

openrisc: switch to generic sigaltstack

2013-02-03T23:16:05+00:00

Signed-off-by: Al Viro

openrisc: switch to use of generic fork and clone

2012-11-29T04:43:40+00:00

Signed-off-by: Al Viro

openrisc: use generic sys_execve

2012-10-19T16:33:01+00:00

Signed-off-by: Jonas Bonn