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hexagon: fix fadvise64_64 calling conventions

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commit 896842284c upstream.

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@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arnd Bergmann 2024-06-20 15:24:11 +02:00 committed by Greg Kroah-Hartman
parent 0f92275527
commit 948dc69f4b
2 changed files with 13 additions and 0 deletions
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6
arch/hexagon/include/asm/syscalls.h Normal file
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@ -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);

7
arch/hexagon/kernel/syscalltab.c
View File

@ -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>
};