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Commit 47455911 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] Kconfig: Move missplaced NR_CPUS default from SMTC to VSMP.
  [MIPS] Lockdep: Fix recursion bug.
  [MIPS] RTLX: Handle copy_*_user return values.
  [MIPS] RTLX: Protect rtlx_{read,write} with mutex.
  [MIPS] RTLX: Harden against compiler reordering and optimization.
  [MIPS] RTLX: Don't use volatile; it's fragile.
  [MIPS] Lasat: Downgrade 64-bit kernel from experimental to broken.
  [MIPS] Compat: Fix build if CONFIG_SYSVIPC is disabled.
  [CHAR] lcd: Fix two warnings.
  [MIPS] FPU ownership management & preemption fixes
  [MIPS] Check FCSR for pending interrupts, alternative version
  [MIPS] IP27, IP35: Fix warnings.
parents 5379058b f510aa3b

arch/mips/Kconfig

+2 −2
Original line number Diff line number Diff line
@@ -250,7 +250,7 @@ config LASAT 
	select R5000_CPU_SCACHE

	select SYS_HAS_CPU_R5000

	select SYS_SUPPORTS_32BIT_KERNEL

	select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL

	select SYS_SUPPORTS_64BIT_KERNEL if BROKEN

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select GENERIC_HARDIRQS_NO__DO_IRQ
@@ -1559,6 +1559,7 @@ config MIPS_MT_SMP 
	select CPU_MIPSR2_IRQ_VI

	select CPU_MIPSR2_SRS

	select MIPS_MT

	select NR_CPUS_DEFAULT_2

	select SMP

	select SYS_SUPPORTS_SMP

	help
@@ -1573,7 +1574,6 @@ config MIPS_MT_SMTC 
	select CPU_MIPSR2_IRQ_VI

	select CPU_MIPSR2_SRS

	select MIPS_MT

	select NR_CPUS_DEFAULT_2

	select NR_CPUS_DEFAULT_8

	select SMP

	select SYS_SUPPORTS_SMP

arch/mips/kernel/kspd.c

+14 −4
Original line number Diff line number Diff line
@@ -191,6 +191,8 @@ void sp_work_handle_request(void) 
	struct mtsp_syscall_generic generic;

	struct mtsp_syscall_ret ret;

	struct kspd_notifications *n;

	unsigned long written;

	mm_segment_t old_fs;

	struct timeval tv;

	struct timezone tz;

	int cmd;
@@ -201,7 +203,11 @@ void sp_work_handle_request(void) 


	ret.retval = -1;



	if (!rtlx_read(RTLX_CHANNEL_SYSIO, &sc, sizeof(struct mtsp_syscall), 0)) {

	old_fs = get_fs();

	set_fs(KERNEL_DS);



	if (!rtlx_read(RTLX_CHANNEL_SYSIO, &sc, sizeof(struct mtsp_syscall))) {

		set_fs(old_fs);

		printk(KERN_ERR "Expected request but nothing to read\n");

		return;

	}
@@ -209,7 +215,8 @@ void sp_work_handle_request(void) 
	size = sc.size;



	if (size) {

		if (!rtlx_read(RTLX_CHANNEL_SYSIO, &generic, size, 0)) {

		if (!rtlx_read(RTLX_CHANNEL_SYSIO, &generic, size)) {

			set_fs(old_fs);

			printk(KERN_ERR "Expected request but nothing to read\n");

			return;

		}
@@ -282,8 +289,11 @@ void sp_work_handle_request(void) 
	if (vpe_getuid(SP_VPE))

		sp_setfsuidgid( 0, 0);



	if ((rtlx_write(RTLX_CHANNEL_SYSIO, &ret, sizeof(struct mtsp_syscall_ret), 0))

	    < sizeof(struct mtsp_syscall_ret))

	old_fs = get_fs();

	set_fs(KERNEL_DS);

	written = rtlx_write(RTLX_CHANNEL_SYSIO, &ret, sizeof(ret));

	set_fs(old_fs);

	if (written < sizeof(ret))

		printk("KSPD: sp_work_handle_request failed to send to SP\n");

}

arch/mips/kernel/linux32.c

+12 −0
Original line number Diff line number Diff line
@@ -311,6 +311,8 @@ asmlinkage int sys32_sched_rr_get_interval(compat_pid_t pid, 
	return ret;

}



#ifdef CONFIG_SYSVIPC



asmlinkage long

sys32_ipc (u32 call, int first, int second, int third, u32 ptr, u32 fifth)

{
@@ -368,6 +370,16 @@ sys32_ipc (u32 call, int first, int second, int third, u32 ptr, u32 fifth) 
	return err;

}



#else



asmlinkage long

sys32_ipc (u32 call, int first, int second, int third, u32 ptr, u32 fifth)

{

	return -ENOSYS;

}



#endif /* CONFIG_SYSVIPC */



#ifdef CONFIG_MIPS32_N32

asmlinkage long sysn32_semctl(int semid, int semnum, int cmd, u32 arg)

{

arch/mips/kernel/r2300_switch.S

+6 −4
Original line number Diff line number Diff line
@@ -49,8 +49,7 @@ LEAF(resume) 
#ifndef CONFIG_CPU_HAS_LLSC

	sw      zero, ll_bit

#endif

	mfc0	t1, CP0_STATUS

	sw	t1, THREAD_STATUS(a0)

	mfc0	t2, CP0_STATUS

	cpu_save_nonscratch a0

	sw	ra, THREAD_REG31(a0)
@@ -60,8 +59,8 @@ LEAF(resume) 
	lw	t3, TASK_THREAD_INFO(a0)

	lw	t0, TI_FLAGS(t3)

	li	t1, _TIF_USEDFPU

	and	t2, t0, t1

	beqz	t2, 1f

	and	t1, t0

	beqz	t1, 1f

	nor	t1, zero, t1



	and	t0, t0, t1
@@ -74,10 +73,13 @@ LEAF(resume) 
	li	t1, ~ST0_CU1

	and	t0, t0, t1

	sw	t0, ST_OFF(t3)

	/* clear thread_struct CU1 bit */

	and	t2, t1



	fpu_save_single a0, t0			# clobbers t0



1:

	sw	t2, THREAD_STATUS(a0)

	/*

	 * The order of restoring the registers takes care of the race

	 * updating $28, $29 and kernelsp without disabling ints.

arch/mips/kernel/r4k_fpu.S

+0 −16
Original line number Diff line number Diff line
@@ -114,14 +114,6 @@ LEAF(_save_fp_context32) 
 */

LEAF(_restore_fp_context)

	EX	lw t0, SC_FPC_CSR(a0)



	/* Fail if the CSR has exceptions pending */

	srl	t1, t0, 5

	and	t1, t0

	andi	t1, 0x1f << 7

	bnez	t1, fault

	 nop



#ifdef CONFIG_64BIT

	EX	ldc1 $f1, SC_FPREGS+8(a0)

	EX	ldc1 $f3, SC_FPREGS+24(a0)
@@ -165,14 +157,6 @@ LEAF(_restore_fp_context) 
LEAF(_restore_fp_context32)

	/* Restore an o32 sigcontext.  */

	EX	lw t0, SC32_FPC_CSR(a0)



	/* Fail if the CSR has exceptions pending */

	srl	t1, t0, 5

	and	t1, t0

	andi	t1, 0x1f << 7

	bnez	t1, fault

	 nop



	EX	ldc1 $f0, SC32_FPREGS+0(a0)

	EX	ldc1 $f2, SC32_FPREGS+16(a0)

	EX	ldc1 $f4, SC32_FPREGS+32(a0)