[Xen-devel][PATCH] xen/xsm: Compile error due to naming clash between XSM and EFI runtime

[James Carter <jwcart2@xxxxxxxxxxxxx>]

While compiling XEN with XSM_ENABLE=y and FLASK_ENABLE=y, I received the 
following error.

gcc -O1 -fno-omit-frame-pointer -m64 -g -fno-strict-aliasing -std=gnu99 -Wall 
-Wstrict-prototypes -Wno-unused-value -Wdeclaration-after-statement 
-Wno-unused-but-set-variable  -fno-builtin -fno-common -Wredundant-decls 
-iwithprefix include -Werror -Wno-pointer-arith -pipe 
-I/home/jwcart2/src/xen/my-xen-unstable/xen/include  
-I/home/jwcart2/src/xen/my-xen-unstable/xen/include/asm-x86/mach-generic 
-I/home/jwcart2/src/xen/my-xen-unstable/xen/include/asm-x86/mach-default 
-msoft-float -fno-stack-protector -fno-exceptions -Wnested-externs 
-mno-red-zone -fpic -fno-asynchronous-unwind-tables 
-DGCC_HAS_VISIBILITY_ATTRIBUTE -fno-optimize-sibling-calls -nostdinc -g 
-D__XEN__ -DXSM_ENABLE -DFLASK_ENABLE -DXSM_MAGIC=0xf97cff8c -DFLASK_DEVELOP 
-DFLASK_BOOTPARAM -DFLASK_AVC_STATS -DVERBOSE -fno-omit-frame-pointer 
-DCONFIG_FRAME_POINTER -MMD -MF .platform_hypercall.o.d -c platform_hypercall.c 
-o platform_hypercall.o
In file included from ../platform_hypercall.c:33:0,
                 from platform_hypercall.c:38:
/home/jwcart2/src/xen/my-xen-unstable/xen/include/xsm/xsm.h: In function 
âxsm_efi_runtime_callâ:
/home/jwcart2/src/xen/my-xen-unstable/xen/include/xsm/xsm.h:559:19: error: 
âstruct xsm_operationsâ has no member named âefi_compat_runtime_callâ
cc1: warnings being treated as errors
/home/jwcart2/src/xen/my-xen-unstable/xen/include/xsm/xsm.h:560:1: error: 
control reaches end of non-void function
make[5]: *** [platform_hypercall.o] Error 1
make[5]: Leaving directory 
`/home/jwcart2/src/xen/my-xen-unstable/xen/arch/x86/x86_64'
make[4]: *** [x86_64/built_in.o] Error 2


The problem is that efi_runtime_call is the name of both a function in
xen/arch/x86/efi/runtime.c and a member of the xsm_operations struct in
xen/include/xsm/xsm.h. This causes the macro "#define
efi_runtime_call(x) efi_compat_runtime_call(x)" on line 15 of
xen/arch/x86/x86_64/platform_hypercall.c to cause the above compile
error. (At least, that is what I think is happening.)

Renaming the XSM struct member fixes the problem.

Signed-off-by: James Carter <jwcart2@xxxxxxxxxxxxx>

---

 arch/x86/platform_hypercall.c |    2 +-
 include/xsm/xsm.h             |    6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff -r 0312575dc35e xen/arch/x86/platform_hypercall.c
--- a/xen/arch/x86/platform_hypercall.c Thu Sep 08 15:13:06 2011 +0100
+++ b/xen/arch/x86/platform_hypercall.c Wed Sep 14 09:48:25 2011 -0400
@@ -306,7 +306,7 @@
         break;
 
     case XENPF_efi_runtime_call:
-        ret = xsm_efi_runtime_call();
+        ret = xsm_efi_call();
         if ( ret )
             break;
 
diff -r 0312575dc35e xen/include/xsm/xsm.h
--- a/xen/include/xsm/xsm.h     Thu Sep 08 15:13:06 2011 +0100
+++ b/xen/include/xsm/xsm.h     Wed Sep 14 09:48:25 2011 -0400
@@ -132,7 +132,7 @@
     int (*physinfo) (void);
     int (*platform_quirk) (uint32_t);
     int (*firmware_info) (void);
-    int (*efi_runtime_call) (void);
+    int (*efi_call) (void);
     int (*acpi_sleep) (void);
     int (*change_freq) (void);
     int (*getidletime) (void);
@@ -554,9 +554,9 @@
     return xsm_call(firmware_info());
 }
 
-static inline int xsm_efi_runtime_call (void)
+static inline int xsm_efi_call (void)
 {
-    return xsm_call(efi_runtime_call());
+    return xsm_call(efi_call());
 }
 
 static inline int xsm_acpi_sleep (void)


-- 
James Carter <jwcart2@xxxxxxxxxxxxx>
National Security Agency


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