summaryrefslogtreecommitdiff
path: root/arch/s390/include/asm/ptrace.h
diff options
context:
space:
mode:
authorSven Schnelle <svens@linux.ibm.com>2021-06-30 14:50:55 +0300
committerVasily Gorbik <gor@linux.ibm.com>2021-07-08 23:12:17 +0300
commite3c7a8d7f44f4b36eb299563526ef8c5cb8011b0 (patch)
tree52cfa082f382217276692a600044625c4c93768a /arch/s390/include/asm/ptrace.h
parentfbf50f47ea99d07aec59859027352d4837e84ce1 (diff)
downloadlinux-e3c7a8d7f44f4b36eb299563526ef8c5cb8011b0.tar.xz
s390: move restart of execve() syscall
On s390, execve might have to be restarted for PGSTE binaries like kvm. In the past this was done via the PIF_SYSCALL_RESTART bit. However, with the recent changes, syscalls are now restarted differently. Now that execve() is the only call that might get restarted via PIF_SYSCALL_RESTART, move the loop to do_syscall(). This also has the advantage that the restart is no longer visible to userspace. Signed-off-by: Sven Schnelle <svens@linux.ibm.com> Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/ptrace.h')
-rw-r--r--arch/s390/include/asm/ptrace.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index c7850d649373..808da21235ab 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -162,6 +162,14 @@ static inline int test_pt_regs_flag(struct pt_regs *regs, int flag)
return !!(regs->flags & (1UL << flag));
}
+static inline int test_and_clear_pt_regs_flag(struct pt_regs *regs, int flag)
+{
+ int ret = test_pt_regs_flag(regs, flag);
+
+ clear_pt_regs_flag(regs, flag);
+ return ret;
+}
+
/*
* These are defined as per linux/ptrace.h, which see.
*/