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Commit 463020ce authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus 

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] Fix sigset_t endianess swapping issues in 32-bit compat code.
  [MIPS] Fix uniprocessor Sibyte builds.
  [MIPS] Make entry.S a little more readable.
  [MIPS] Remove stray instruction from __get_user_asm_ll32.
  [MIPS] 32-bit: Fix warning about cast for fetching pointer from userspace.
  [MIPS] DECstation: Fix irq handling
  [MIPS] signals: make common _BLOCKABLE macro
  [MIPS] signal: Move sigframe definition for native O32/N64 into signal.c
  [MIPS] signal: Move {restore,setup}_sigcontext prototypes to their user
  [MIPS] signal: Fix warnings in o32 compat code.
  [MIPS] IP27: Enable N32 support in defconfig.
  Revert "[MIPS] Fix warning in get_user when fetching pointer object from userspace."
  [MIPS] Don't claim we support dma_declare_coherent_memory - we don't.
  [MIPS] Unify dma-{coherent,noncoherent.ip27,ip32}
  [MIPS] Improve branch prediction in ll/sc atomic operations.
parents 58a3bb59 431dc804

arch/mips/Kconfig

+0 −5
Original line number Diff line number Diff line
@@ -598,8 +598,6 @@ config SGI_IP32 
	select ARC

	select ARC32

	select BOOT_ELF32

	select OWN_DMA

	select DMA_IP32

	select DMA_NONCOHERENT

	select HW_HAS_PCI

	select R5000_CPU_SCACHE
@@ -883,9 +881,6 @@ config DMA_NONCOHERENT 
config DMA_NEED_PCI_MAP_STATE

	bool



config OWN_DMA

	bool



config EARLY_PRINTK

	bool

arch/mips/configs/ip27_defconfig

+1 −1
Original line number Diff line number Diff line
@@ -264,7 +264,7 @@ CONFIG_BINFMT_ELF=y 
CONFIG_MIPS32_COMPAT=y

CONFIG_COMPAT=y

CONFIG_MIPS32_O32=y

# CONFIG_MIPS32_N32 is not set

CONFIG_MIPS32_N32=y

CONFIG_BINFMT_ELF32=y



#

arch/mips/dec/int-handler.S

+0 −4
Original line number Diff line number Diff line
@@ -264,9 +264,6 @@ 
		 srlv	t3,t1,t2



handle_it:

		LONG_L	s0, TI_REGS($28)

		LONG_S	sp, TI_REGS($28)

		PTR_LA	ra, ret_from_irq

		j	dec_irq_dispatch

		 nop
@@ -277,7 +274,6 @@ fpu: 
#endif



spurious:

		PTR_LA	ra, _ret_from_irq

		j	spurious_interrupt

		 nop

		END(plat_irq_dispatch)

arch/mips/kernel/entry.S

+8 −11
Original line number Diff line number Diff line
@@ -21,24 +21,21 @@ 
#endif



#ifndef CONFIG_PREEMPT

	.macro	preempt_stop

	local_irq_disable

	.endm

#define resume_kernel	restore_all

#else

#define __ret_from_irq	ret_from_exception

#endif



	.text

	.align	5

FEXPORT(ret_from_irq)

	LONG_S	s0, TI_REGS($28)

#ifdef CONFIG_PREEMPT

FEXPORT(ret_from_exception)

#else

	b	_ret_from_irq

#ifndef CONFIG_PREEMPT

FEXPORT(ret_from_exception)

	preempt_stop

	local_irq_disable			# preempt stop

	b	__ret_from_irq

#endif

FEXPORT(_ret_from_irq)

FEXPORT(ret_from_irq)

	LONG_S	s0, TI_REGS($28)

FEXPORT(__ret_from_irq)

	LONG_L	t0, PT_STATUS(sp)		# returning to kernel mode?

	andi	t0, t0, KU_USER

	beqz	t0, resume_kernel

arch/mips/kernel/linux32.c

+47 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ 
#include <net/sock.h>

#include <net/scm.h>



#include <asm/compat-signal.h>

#include <asm/ipc.h>

#include <asm/sim.h>

#include <asm/uaccess.h>
@@ -736,3 +737,49 @@ _sys32_clone(nabi_no_regargs struct pt_regs regs) 
	return do_fork(clone_flags, newsp, &regs, 0,

	               parent_tidptr, child_tidptr);

}



/*

 * Implement the event wait interface for the eventpoll file. It is the kernel

 * part of the user space epoll_pwait(2).

 */

asmlinkage long compat_sys_epoll_pwait(int epfd,

	struct epoll_event __user *events, int maxevents, int timeout,

	const compat_sigset_t __user *sigmask, size_t sigsetsize)

{

	int error;

	sigset_t ksigmask, sigsaved;



	/*

	 * If the caller wants a certain signal mask to be set during the wait,

	 * we apply it here.

	 */

	if (sigmask) {

		if (sigsetsize != sizeof(sigset_t))

			return -EINVAL;

		if (!access_ok(VERIFY_READ, sigmask, sizeof(ksigmask)))

			return -EFAULT;

		if (__copy_conv_sigset_from_user(&ksigmask, sigmask))

			return -EFAULT;

		sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));

		sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);

	}



	error = sys_epoll_wait(epfd, events, maxevents, timeout);



	/*

	 * If we changed the signal mask, we need to restore the original one.

	 * In case we've got a signal while waiting, we do not restore the

	 * signal mask yet, and we allow do_signal() to deliver the signal on

	 * the way back to userspace, before the signal mask is restored.

	 */

	if (sigmask) {

		if (error == -EINTR) {

			memcpy(&current->saved_sigmask, &sigsaved,

				sizeof(sigsaved));

			set_thread_flag(TIF_RESTORE_SIGMASK);

		} else

			sigprocmask(SIG_SETMASK, &sigsaved, NULL);

	}



	return error;

}