linux-kernel - [PATCH linux-next v8 4/7] parisc: define syscall_get

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Date:   Fri, 22 Mar 2019 07:15:54 +0300
From:   "Dmitry V. Levin" <ldv@...linux.org>
To:     linux-kernel@...r.kernel.org
Cc:     Elvira Khabirova <lineprinter@...linux.org>,
        Eugene Syromyatnikov <esyr@...hat.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Andy Lutomirski <luto@...nel.org>,
        Helge Deller <deller@....de>,
        "James E.J. Bottomley" <jejb@...isc-linux.org>,
        linux-parisc@...r.kernel.org
Subject: [PATCH linux-next v8 4/7] parisc: define syscall_get_error()

syscall_get_error() is required to be implemented on all
architectures in addition to already implemented syscall_get_nr(),
syscall_get_arguments(), syscall_get_return_value(), and
syscall_get_arch() functions in order to extend the generic
ptrace API with PTRACE_GET_SYSCALL_INFO request.

Acked-by: Helge Deller <deller@....de> # parisc
Cc: James E.J. Bottomley <jejb@...isc-linux.org>
Cc: Elvira Khabirova <lineprinter@...linux.org>
Cc: Eugene Syromyatnikov <esyr@...hat.com>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: linux-parisc@...r.kernel.org
Signed-off-by: Dmitry V. Levin <ldv@...linux.org>
---

Notes:
    v8: added Acked-by
    v7: unchanged
    v6: unchanged
    v5: initial revision

 arch/parisc/include/asm/syscall.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/parisc/include/asm/syscall.h b/arch/parisc/include/asm/syscall.h
index c04ffc6ac928..310016e1925d 100644
--- a/arch/parisc/include/asm/syscall.h
+++ b/arch/parisc/include/asm/syscall.h
@@ -43,6 +43,13 @@ static inline void syscall_get_arguments(struct task_struct *tsk,
 	}
 }
 
+static inline long syscall_get_error(struct task_struct *task,
+				     struct pt_regs *regs)
+{
+	unsigned long error = regs->gr[28];
+	return IS_ERR_VALUE(error) ? error : 0;
+}
+
 static inline long syscall_get_return_value(struct task_struct *task,
 						struct pt_regs *regs)
 {
-- 
ldv