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| author | Arnd Bergmann <arnd@arndb.de> | 2024-06-20 15:24:11 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2024-06-25 15:57:37 +0200 |
| commit | 896842284c6ccba25ec9d78b7b6e62cdd507c083 (patch) | |
| tree | 83b89c264299aea7dfcc208735870d58aae8c9df /arch/hexagon | |
| parent | 3339b99ef6fe38dac43b534cba3a8a0e29fb2eff (diff) | |
| download | lwn-896842284c6ccba25ec9d78b7b6e62cdd507c083.tar.gz lwn-896842284c6ccba25ec9d78b7b6e62cdd507c083.zip | |
hexagon: fix fadvise64_64 calling conventions
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>
Diffstat (limited to 'arch/hexagon')
| -rw-r--r-- | arch/hexagon/include/asm/syscalls.h | 6 | ||||
| -rw-r--r-- | arch/hexagon/kernel/syscalltab.c | 7 |
2 files changed, 13 insertions, 0 deletions
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> }; |