diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2020-05-07 22:13:31 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-05-15 11:58:54 +1000 |
| commit | 912237ea166428edcbf3c137adf12cb987c477f2 (patch) | |
| tree | e5397bfdc0e5723782986aeceb77db3a06de4947 /arch/powerpc/include/asm/syscall.h | |
| parent | db30144b5c9cfb09c6b8b2fa7a9c351c94aa3433 (diff) | |
powerpc: trap_is_syscall() helper to hide syscall trap number
A new system call interrupt will be added with a new trap number.
Hide the explicit 0xc00 test behind an accessor to reduce churn
in callers.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Make it a static inline]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200507121332.2233629-3-mpe@ellerman.id.au
Diffstat (limited to 'arch/powerpc/include/asm/syscall.h')
| -rw-r--r-- | arch/powerpc/include/asm/syscall.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/syscall.h b/arch/powerpc/include/asm/syscall.h index 38d62acfdce7..fd1b518eed17 100644 --- a/arch/powerpc/include/asm/syscall.h +++ b/arch/powerpc/include/asm/syscall.h @@ -26,7 +26,10 @@ static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) * This is important for seccomp so that compat tasks can set r0 = -1 * to reject the syscall. */ - return TRAP(regs) == 0xc00 ? regs->gpr[0] : -1; + if (trap_is_syscall(regs)) + return regs->gpr[0]; + else + return -1; } static inline void syscall_rollback(struct task_struct *task, |