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| author | kaf24@scramble.cl.cam.ac.uk <kaf24@scramble.cl.cam.ac.uk> | 2003-11-10 13:44:15 +0000 |
|---|---|---|
| committer | kaf24@scramble.cl.cam.ac.uk <kaf24@scramble.cl.cam.ac.uk> | 2003-11-10 13:44:15 +0000 |
| commit | c00aa14e171953d2f31d3e159e27c4d60786bf86 (patch) | |
| tree | 3605dec6fc407bd2c0be991d8607d910da2c9ab1 /extras | |
| parent | a909963f9a6f1b4226db2187a974bf8782d8b48c (diff) | |
| download | xen-c00aa14e171953d2f31d3e159e27c4d60786bf86.tar.gz xen-c00aa14e171953d2f31d3e159e27c4d60786bf86.tar.bz2 xen-c00aa14e171953d2f31d3e159e27c4d60786bf86.zip | |
bitkeeper revision 1.582 (3faf962fX5syo8fIhzw2drHCKGZJ0w)
os.h:
Fix mini-os for pre 2.96 gcc.
Diffstat (limited to 'extras')
| -rw-r--r-- | extras/mini-os/h/os.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/extras/mini-os/h/os.h b/extras/mini-os/h/os.h index c63ae6cdd5..9be205e009 100644 --- a/extras/mini-os/h/os.h +++ b/extras/mini-os/h/os.h @@ -9,6 +9,15 @@ #define NULL 0 +/* Somewhere in the middle of the GCC 2.96 development cycle, we implemented + a mechanism by which the user can annotate likely branch directions and + expect the blocks to be reordered appropriately. Define __builtin_expect + to nothing for earlier compilers. */ + +#if __GNUC__ == 2 && __GNUC_MINOR__ < 96 +#define __builtin_expect(x, expected_value) (x) +#endif + /* * These are the segment descriptors provided for us by the hypervisor. * For now, these are hardwired -- guest OSes cannot update the GDT |