Fix return type of process_madvise().
Noticed this from
https://man7.org/linux/man-pages/man2/process_madvise.2.html but
independently confirmed by checking the kernel source.
Also fix the documentation.
Test: treehugger
Change-Id: I6beeeeb2178a58a22a36532e634917b3ae8767ee
diff --git a/libc/SYSCALLS.TXT b/libc/SYSCALLS.TXT
index d263508..ec34828 100644
--- a/libc/SYSCALLS.TXT
+++ b/libc/SYSCALLS.TXT
@@ -113,7 +113,7 @@
int msync(const void*, size_t, int) all
int mprotect(const void*, size_t, int) all
int madvise(void*, size_t, int) all
-int process_madvise(int, const struct iovec*, size_t, int, unsigned int) all
+ssize_t process_madvise(int, const struct iovec*, size_t, int, unsigned int) all
int mlock(const void* addr, size_t len) all
int mlock2(const void* addr, size_t len, int flags) all
int munlock(const void* addr, size_t len) all