[xen stable-4.15] libxencall: osdep_hypercall() should return long

[patchbot@xxxxxxx]

commit c773053bdbf3780cd2aa2ebe61837afc3de36bd0
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu Jun 24 16:38:37 2021 +0200
Commit:     Ian Jackson <iwj@xxxxxxxxxxxxxx>
CommitDate: Thu Aug 19 17:33:40 2021 +0100

    libxencall: osdep_hypercall() should return long
    
    Some hypercalls, memory-op in particular, can return values requiring
    more than 31 bits to represent. Hence the underlying layers need to make
    sure they won't truncate such values. (Note that for Solaris the
    function also gets renamed, to match the other OSes.)
    
    Due to them merely propagating ioctl()'s return value, this change is
    benign on Linux and Solaris. IOW there's an actual effect here only for
    the BSDs and MiniOS, but even then further adjustments are needed at the
    xencall<N>() level.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Ian Jackson <iwj@xxxxxxxxxxxxxx>
    Backport-requested-by: Jan Beulich <jbeulich@xxxxxxxx>
    (cherry picked from commit 6409210a5f51860cb17b5e0f97debe164dab26d7)
---
 tools/libs/call/freebsd.c | 2 +-
 tools/libs/call/linux.c   | 2 +-
 tools/libs/call/minios.c  | 2 +-
 tools/libs/call/netbsd.c  | 2 +-
 tools/libs/call/private.h | 2 +-
 tools/libs/call/solaris.c | 2 +-
 6 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/tools/libs/call/freebsd.c b/tools/libs/call/freebsd.c
index 28bfd852c1..6d2e8704b3 100644
--- a/tools/libs/call/freebsd.c
+++ b/tools/libs/call/freebsd.c
@@ -62,7 +62,7 @@ int osdep_xencall_close(xencall_handle *xcall)
     return close(fd);
 }
 
-int osdep_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall)
+long osdep_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall)
 {
     int fd = xcall->fd;
     int ret;
diff --git a/tools/libs/call/linux.c b/tools/libs/call/linux.c
index 51fa4899eb..6d588e6bea 100644
--- a/tools/libs/call/linux.c
+++ b/tools/libs/call/linux.c
@@ -80,7 +80,7 @@ int osdep_xencall_close(xencall_handle *xcall)
     return 0;
 }
 
-int osdep_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall)
+long osdep_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall)
 {
     return ioctl(xcall->fd, IOCTL_PRIVCMD_HYPERCALL, hypercall);
 }
diff --git a/tools/libs/call/minios.c b/tools/libs/call/minios.c
index 9f7a96995f..3f33b83578 100644
--- a/tools/libs/call/minios.c
+++ b/tools/libs/call/minios.c
@@ -38,7 +38,7 @@ int osdep_xencall_close(xencall_handle *xcall)
     return 0;
 }
 
-int osdep_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall)
+long osdep_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall)
 {
     multicall_entry_t call;
     int i, ret;
diff --git a/tools/libs/call/netbsd.c b/tools/libs/call/netbsd.c
index 4dcc2919ba..91ae68357e 100644
--- a/tools/libs/call/netbsd.c
+++ b/tools/libs/call/netbsd.c
@@ -96,7 +96,7 @@ void osdep_free_pages(xencall_handle *xcall, void *ptr, 
size_t npages)
     free(ptr);
 }
 
-int osdep_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall)
+long osdep_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall)
 {
     int fd = xcall->fd;
     int error = ioctl(fd, IOCTL_PRIVCMD_HYPERCALL, hypercall);
diff --git a/tools/libs/call/private.h b/tools/libs/call/private.h
index 7944ac5baf..9c3aa432ef 100644
--- a/tools/libs/call/private.h
+++ b/tools/libs/call/private.h
@@ -55,7 +55,7 @@ struct xencall_handle {
 int osdep_xencall_open(xencall_handle *xcall);
 int osdep_xencall_close(xencall_handle *xcall);
 
-int osdep_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall);
+long osdep_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall);
 
 void *osdep_alloc_pages(xencall_handle *xcall, size_t nr_pages);
 void osdep_free_pages(xencall_handle *xcall, void *p, size_t nr_pages);
diff --git a/tools/libs/call/solaris.c b/tools/libs/call/solaris.c
index c63b6a329a..304262bd05 100644
--- a/tools/libs/call/solaris.c
+++ b/tools/libs/call/solaris.c
@@ -80,7 +80,7 @@ void osdep_free_hypercall_buffer(xencall_handle *xcall, void 
*ptr,
     free(ptr);
 }
 
-int do_xen_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall)
+long osdep_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall)
 {
     int fd = xcall->fd;
     return ioctl(fd, IOCTL_PRIVCMD_HYPERCALL, hypercall);
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.15