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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-06-25 06:19:14 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-08 13:11:03 +0200 |
| commit | 97349135fea7f0ba8464534433df3bfd1dc0e9a6 (patch) | |
| tree | 7eb615f8c4b83a8327da92b96d95a44f8f54f101 /include | |
| parent | x86: preallocate and prepopulate separately (diff) | |
| download | linux-97349135fea7f0ba8464534433df3bfd1dc0e9a6.tar.xz linux-97349135fea7f0ba8464534433df3bfd1dc0e9a6.zip | |
x86/paravirt: add debugging for missing operations
Rather than just jumping to 0 when there's a missing operation, raise a BUG.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-x86/paravirt.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h index 5467e2cff4bc..198293bed46f 100644 --- a/include/asm-x86/paravirt.h +++ b/include/asm-x86/paravirt.h @@ -459,10 +459,17 @@ int paravirt_disable_iospace(void); #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11" #endif +#ifdef CONFIG_PARAVIRT_DEBUG +#define PVOP_TEST_NULL(op) BUG_ON(op == NULL) +#else +#define PVOP_TEST_NULL(op) ((void)op) +#endif + #define __PVOP_CALL(rettype, op, pre, post, ...) \ ({ \ rettype __ret; \ PVOP_CALL_ARGS; \ + PVOP_TEST_NULL(op); \ /* This is 32-bit specific, but is okay in 64-bit */ \ /* since this condition will never hold */ \ if (sizeof(rettype) > sizeof(unsigned long)) { \ @@ -491,6 +498,7 @@ int paravirt_disable_iospace(void); #define __PVOP_VCALL(op, pre, post, ...) \ ({ \ PVOP_VCALL_ARGS; \ + PVOP_TEST_NULL(op); \ asm volatile(pre \ paravirt_alt(PARAVIRT_CALL) \ post \ |