xtensa: fix coprocessor context offset definitions

Coprocessor context offsets are used by the assembly code that moves
coprocessor context between the individual fields of the
thread_info::xtregs_cp structure and coprocessor registers.
This fixes coprocessor context clobbering on flushing and reloading
during normal user code execution and user process debugging in the
presence of more than one coprocessor in the core configuration.

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

diff --git a/arch/xtensa/kernel/asm-offsets.c b/arch/xtensa/kernel/asm-offsets.c
index 67904f55f1884f52893b3a99b1be785a48dc69da..120dd746a14751f3de4317a35921b2037d8c7cdd 100644 (file)
--- a/arch/xtensa/kernel/asm-offsets.c
+++ b/arch/xtensa/kernel/asm-offsets.c
@@ -94,14 +94,14 @@ int main(void)
        DEFINE(THREAD_SP, offsetof (struct task_struct, thread.sp));
        DEFINE(THREAD_CPENABLE, offsetof (struct thread_info, cpenable));
 #if XTENSA_HAVE_COPROCESSORS
-       DEFINE(THREAD_XTREGS_CP0, offsetof (struct thread_info, xtregs_cp));
-       DEFINE(THREAD_XTREGS_CP1, offsetof (struct thread_info, xtregs_cp));
-       DEFINE(THREAD_XTREGS_CP2, offsetof (struct thread_info, xtregs_cp));
-       DEFINE(THREAD_XTREGS_CP3, offsetof (struct thread_info, xtregs_cp));
-       DEFINE(THREAD_XTREGS_CP4, offsetof (struct thread_info, xtregs_cp));
-       DEFINE(THREAD_XTREGS_CP5, offsetof (struct thread_info, xtregs_cp));
-       DEFINE(THREAD_XTREGS_CP6, offsetof (struct thread_info, xtregs_cp));
-       DEFINE(THREAD_XTREGS_CP7, offsetof (struct thread_info, xtregs_cp));
+       DEFINE(THREAD_XTREGS_CP0, offsetof(struct thread_info, xtregs_cp.cp0));
+       DEFINE(THREAD_XTREGS_CP1, offsetof(struct thread_info, xtregs_cp.cp1));
+       DEFINE(THREAD_XTREGS_CP2, offsetof(struct thread_info, xtregs_cp.cp2));
+       DEFINE(THREAD_XTREGS_CP3, offsetof(struct thread_info, xtregs_cp.cp3));
+       DEFINE(THREAD_XTREGS_CP4, offsetof(struct thread_info, xtregs_cp.cp4));
+       DEFINE(THREAD_XTREGS_CP5, offsetof(struct thread_info, xtregs_cp.cp5));
+       DEFINE(THREAD_XTREGS_CP6, offsetof(struct thread_info, xtregs_cp.cp6));
+       DEFINE(THREAD_XTREGS_CP7, offsetof(struct thread_info, xtregs_cp.cp7));
 #endif
        DEFINE(THREAD_XTREGS_USER, offsetof (struct thread_info, xtregs_user));
        DEFINE(XTREGS_USER_SIZE, sizeof(xtregs_user_t));