Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6d6671066a311703bca1b91645bb1e04cc983387
Commit: 6d6671066a311703bca1b91645bb1e04cc983387
Parent: b86b30f81c7601d9a410d2ce0c64d9ba50d673ae
Author: Chris Dearman <[EMAIL PROTECTED]>
AuthorDate: Thu Feb 1 19:54:13 2007 +0000
Committer: Ralf Baechle <[EMAIL PROTECTED]>
CommitDate: Tue Feb 6 16:53:23 2007 +0000
[MIPS] Check FCSR for pending interrupts before restoring from a context.
Signed-off-by: Chris Dearman <[EMAIL PROTECTED]>
Signed-off-by: Ralf Baechle <[EMAIL PROTECTED]>
---
arch/mips/kernel/r4k_fpu.S | 16 ++++++++++++++++
1 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/arch/mips/kernel/r4k_fpu.S b/arch/mips/kernel/r4k_fpu.S
index 880fa6e..8b5ccfa 100644
--- a/arch/mips/kernel/r4k_fpu.S
+++ b/arch/mips/kernel/r4k_fpu.S
@@ -114,6 +114,14 @@ 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)
@@ -157,6 +165,14 @@ 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)
-
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