commit b50511e41aa51a89b4176784a670582424bc7db6
author Martin Schwidefsky <schwidefsky@de.ibm.com> Sun Oct 30 15:16:50 2011 +0100
committer Martin Schwidefsky <schwidefsky@de.ibm.com> Sun Oct 30 15:16:43 2011 +0100
tree 0ad1553c7f2431878310e590187ee59ccb4d8cab
parent b6ef5bb3d93efb95ba855a628740375c2280a59e

[S390] cleanup psw related bits and pieces

Split out addressing mode bits from PSW_BASE_BITS, rename PSW_BASE_BITS
to PSW_MASK_BASE, get rid of psw_user32_bits, remove unused function
enabled_wait(), introduce PSW_MASK_USER, and drop PSW_MASK_MERGE macros.
Change psw_kernel_bits / psw_user_bits to contain only the bits that
are always set in the respective mode.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/kernel/signal.c

diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 0e905cb..c197558 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -117,7 +117,8 @@
 
 	/* Copy a 'clean' PSW mask to the user to avoid leaking
 	   information about whether PER is currently on.  */
-	user_sregs.regs.psw.mask = PSW_MASK_MERGE(psw_user_bits, regs->psw.mask);
+	user_sregs.regs.psw.mask = psw_user_bits | PSW_MASK_EA | PSW_MASK_BA |
+				   (regs->psw.mask & PSW_MASK_USER);
 	user_sregs.regs.psw.addr = regs->psw.addr;
 	memcpy(&user_sregs.regs.gprs, &regs->gprs, sizeof(sregs->regs.gprs));
 	memcpy(&user_sregs.regs.acrs, current->thread.acrs,
@@ -144,8 +145,8 @@
 	err = __copy_from_user(&user_sregs, sregs, sizeof(_sigregs));
 	if (err)
 		return err;
-	regs->psw.mask = PSW_MASK_MERGE(regs->psw.mask,
-					user_sregs.regs.psw.mask);
+	regs->psw.mask = (regs->psw.mask & ~PSW_MASK_USER) |
+			 (user_sregs.regs.psw.mask & PSW_MASK_USER);
 	regs->psw.addr = PSW_ADDR_AMODE | user_sregs.regs.psw.addr;
 	memcpy(&regs->gprs, &user_sregs.regs.gprs, sizeof(sregs->regs.gprs));
 	memcpy(&current->thread.acrs, &user_sregs.regs.acrs,