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author | Jeff Garzik <jgarzik@pretzel.yyz.us> | 2005-06-22 13:07:28 -0400 |
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committer | Jeff Garzik <jgarzik@pobox.com> | 2005-06-22 13:07:28 -0400 |
commit | ff40c6d3d1437ecdf295b8e39adcb06c3d6021ef (patch) | |
tree | 3666d029b4bd4df2909dbefd9c7a09e6042b7d32 /arch/um/sys-i386/unmap.c | |
parent | 8bf62ecee58360749c5f0e68bc97d5e02a6816b1 (diff) | |
parent | 2a5a68b840cbab31baab2d9b2e1e6de3b289ae1e (diff) |
Merge upstream kernel changes into 'C/H/S support' branch of libata.
Diffstat (limited to 'arch/um/sys-i386/unmap.c')
-rw-r--r-- | arch/um/sys-i386/unmap.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/um/sys-i386/unmap.c b/arch/um/sys-i386/unmap.c new file mode 100644 index 00000000000..136875263d2 --- /dev/null +++ b/arch/um/sys-i386/unmap.c @@ -0,0 +1,25 @@ +/* + * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include <linux/mman.h> +#include <asm/unistd.h> + +static int errno; + +static inline _syscall2(int,munmap,void *,start,size_t,len) +static inline _syscall6(void *,mmap2,void *,addr,size_t,len,int,prot,int,flags,int,fd,off_t,offset) +int switcheroo(int fd, int prot, void *from, void *to, int size) +{ + if(munmap(to, size) < 0){ + return(-1); + } + if(mmap2(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) != to){ + return(-1); + } + if(munmap(from, size) < 0){ + return(-1); + } + return(0); +} |