[PATCH v2] linux: posix_fadvise: restore implementation for xtensa
Baruch Siach
baruch at tkos.co.il
Sun Jan 5 09:44:02 UTC 2014
Commit ee84b8b400 (linux: posix_fadvise: use new SYSCALL_ALIGN_64BIT)
removed posix_fadvise implementation for xtensa, since xtensa does not
define __NR_fadvise64. Reuse the ARM support code to restore xtensa support.
This commit is based Mike Frysinger's suggested patch.
Cc: Mike Frysinger <vapier at gentoo.org>
Signed-off-by: Baruch Siach <baruch at tkos.co.il>
---
v2: Use Mike's approach, v1 was broken
---
libc/sysdeps/linux/common/posix_fadvise.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/libc/sysdeps/linux/common/posix_fadvise.c b/libc/sysdeps/linux/common/posix_fadvise.c
index e102ce7afe31..25c294178e5e 100644
--- a/libc/sysdeps/linux/common/posix_fadvise.c
+++ b/libc/sysdeps/linux/common/posix_fadvise.c
@@ -10,18 +10,25 @@
#include <sys/syscall.h>
-#if defined(__NR_fadvise64) || defined(__NR_arm_fadvise64_64)
+#ifdef __NR_arm_fadvise64_64
+/* We handle the 64bit alignment issue which is why the arm guys renamed their
+ * syscall in the first place. So rename it back.
+ */
+# define __NR_fadvise64_64 __NR_arm_fadvise64_64
+#endif
+
+#if defined(__NR_fadvise64) || defined(__NR_fadvise64_64)
# include <fcntl.h>
# include <endian.h>
# include <bits/wordsize.h>
-# ifdef __NR_arm_fadvise64_64
+# ifdef __NR_fadvise64_64
int posix_fadvise64(int fd, off64_t offset, off64_t len, int advice);
# endif
int posix_fadvise(int fd, off_t offset, off_t len, int advice)
{
-# ifdef __NR_arm_fadvise64_64
+# ifdef __NR_fadvise64_64
return posix_fadvise64(fd, offset, len, advice);
# else
int ret;
@@ -41,7 +48,7 @@ int posix_fadvise(int fd, off_t offset, off_t len, int advice)
return 0;
# endif
}
-# if defined __UCLIBC_HAS_LFS__ && ((!defined __NR_fadvise64_64 && !defined __NR_arm_fadvise64_64) || __WORDSIZE == 64)
+# if defined __UCLIBC_HAS_LFS__ && (!defined __NR_fadvise64_64 || __WORDSIZE == 64)
strong_alias(posix_fadvise,posix_fadvise64)
# endif
#endif
--
1.8.5.2
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