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authorGuo Ren <guoren@linux.alibaba.com>2022-04-05 15:13:05 +0800
committerPalmer Dabbelt <palmer@rivosinc.com>2022-04-26 13:36:25 -0700
commit59c10c52f573faca862cda5ebcdd43831608eb5a (patch)
tree786a8dd25890ba8b97f07f01011c02d4a869ad08 /mm/readahead.c
parent01abdfeac81b5f56062d0a78f2cdc805db937a75 (diff)
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riscv: compat: syscall: Add compat_sys_call_table implementation
Implement compat sys_call_table and some system call functions: truncate64, ftruncate64, fallocate, pread64, pwrite64, sync_file_range, readahead, fadvise64_64 which need argument translation. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Guo Ren <guoren@kernel.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Tested-by: Heiko Stuebner <heiko@sntech.de> Link: https://lore.kernel.org/r/20220405071314.3225832-12-guoren@kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'mm/readahead.c')
-rw-r--r--mm/readahead.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/readahead.c b/mm/readahead.c
index 8e3775829513..a9ba3bb19ad0 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -746,6 +746,13 @@ SYSCALL_DEFINE3(readahead, int, fd, loff_t, offset, size_t, count)
return ksys_readahead(fd, offset, count);
}
+#if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_READAHEAD)
+COMPAT_SYSCALL_DEFINE4(readahead, int, fd, compat_arg_u64_dual(offset), size_t, count)
+{
+ return ksys_readahead(fd, compat_arg_u64_glue(offset), count);
+}
+#endif
+
/**
* readahead_expand - Expand a readahead request
* @ractl: The request to be expanded