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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2011-10-30 15:16:50 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2011-10-30 15:16:43 +0100
commitb50511e41aa51a89b4176784a670582424bc7db6 (patch)
tree0ad1553c7f2431878310e590187ee59ccb4d8cab /arch/s390/kernel/signal.c
parentb6ef5bb3d93efb95ba855a628740375c2280a59e (diff)
downloadlinux-b50511e41aa51a89b4176784a670582424bc7db6.tar.gz
[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>
Diffstat (limited to 'arch/s390/kernel/signal.c')
-rw-r--r--arch/s390/kernel/signal.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 0e905cb7604a..c19755815e53 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -117,7 +117,8 @@ static int save_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
/* 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 @@ static int restore_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
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,