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Message-Id: <20240620162316.3674955-12-arnd@kernel.org>
Date: Thu, 20 Jun 2024 18:23:12 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: linux-arch@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Arnd Bergmann <arnd@...db.de>,
Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
linux-mips@...r.kernel.org,
Helge Deller <deller@....de>,
linux-parisc@...r.kernel.org,
"David S. Miller" <davem@...emloft.net>,
Andreas Larsson <andreas@...sler.com>,
sparclinux@...r.kernel.org,
Michael Ellerman <mpe@...erman.id.au>,
Nicholas Piggin <npiggin@...il.com>,
Christophe Leroy <christophe.leroy@...roup.eu>,
"Naveen N . Rao" <naveen.n.rao@...ux.ibm.com>,
linuxppc-dev@...ts.ozlabs.org,
Brian Cain <bcain@...cinc.com>,
linux-hexagon@...r.kernel.org,
Guo Ren <guoren@...nel.org>,
linux-csky@...r.kernel.org,
Heiko Carstens <hca@...ux.ibm.com>,
linux-s390@...r.kernel.org,
Rich Felker <dalias@...c.org>,
John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
linux-sh@...r.kernel.org,
"H. Peter Anvin" <hpa@...or.com>,
Alexander Viro <viro@...iv.linux.org.uk>,
Christian Brauner <brauner@...nel.org>,
linux-fsdevel@...r.kernel.org,
libc-alpha@...rceware.org,
musl@...ts.openwall.com,
ltp@...ts.linux.it,
stable@...r.kernel.org
Subject: [PATCH 11/15] hexagon: fix fadvise64_64 calling conventions
From: Arnd Bergmann <arnd@...db.de>
fadvise64_64() has two 64-bit arguments at the wrong alignment
for hexagon, which turns them into a 7-argument syscall that is
not supported by Linux.
The downstream musl port for hexagon actually asks for a 6-argument
version the same way we do it on arm, csky, powerpc, so make the
kernel do it the same way to avoid having to change both.
Link: https://github.com/quic/musl/blob/hexagon/arch/hexagon/syscall_arch.h#L78
Cc: stable@...r.kernel.org
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
arch/hexagon/include/asm/syscalls.h | 6 ++++++
arch/hexagon/kernel/syscalltab.c | 7 +++++++
2 files changed, 13 insertions(+)
create mode 100644 arch/hexagon/include/asm/syscalls.h
diff --git a/arch/hexagon/include/asm/syscalls.h b/arch/hexagon/include/asm/syscalls.h
new file mode 100644
index 000000000000..40f2d08bec92
--- /dev/null
+++ b/arch/hexagon/include/asm/syscalls.h
@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include <asm-generic/syscalls.h>
+
+asmlinkage long sys_hexagon_fadvise64_64(int fd, int advice,
+ u32 a2, u32 a3, u32 a4, u32 a5);
diff --git a/arch/hexagon/kernel/syscalltab.c b/arch/hexagon/kernel/syscalltab.c
index 0fadd582cfc7..5d98bdc494ec 100644
--- a/arch/hexagon/kernel/syscalltab.c
+++ b/arch/hexagon/kernel/syscalltab.c
@@ -14,6 +14,13 @@
#undef __SYSCALL
#define __SYSCALL(nr, call) [nr] = (call),
+SYSCALL_DEFINE6(hexagon_fadvise64_64, int, fd, int, advice,
+ SC_ARG64(offset), SC_ARG64(len))
+{
+ return ksys_fadvise64_64(fd, SC_VAL64(loff_t, offset), SC_VAL64(loff_t, len), advice);
+}
+#define sys_fadvise64_64 sys_hexagon_fadvise64_64
+
void *sys_call_table[__NR_syscalls] = {
#include <asm/unistd.h>
};
--
2.39.2
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