diff options
Diffstat (limited to 'arch/um/kernel/tt/unmap.c')
-rw-r--r-- | arch/um/kernel/tt/unmap.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/um/kernel/tt/unmap.c b/arch/um/kernel/tt/unmap.c new file mode 100644 index 000000000000..3f7aecdbe532 --- /dev/null +++ b/arch/um/kernel/tt/unmap.c @@ -0,0 +1,31 @@ +/* + * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include <sys/mman.h> + +int switcheroo(int fd, int prot, void *from, void *to, int size) +{ + if(munmap(to, size) < 0){ + return(-1); + } + if(mmap(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) != to){ + return(-1); + } + if(munmap(from, size) < 0){ + return(-1); + } + return(0); +} + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * --------------------------------------------------------------------------- + * Local variables: + * c-file-style: "linux" + * End: + */ |