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authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>2006-10-30 09:46:41 +0300
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-30 23:08:41 +0300
commitb428b51ed9a4ff8445ea50769961f948480c1d36 (patch)
treeea9f79dc8c56310710c39d7472b55f272b63c401 /arch/um/sys-x86_64
parentbbb5bbb037812ba36d638014a93134148a568684 (diff)
downloadlinux-b428b51ed9a4ff8445ea50769961f948480c1d36.tar.xz
[PATCH] Fix "Remove the use of _syscallX macros in UML"
Fix commit 5f4c6bc1f369f20807a8e753c2308d1629478c61: it spits out warnings about missing syscall prototype (it is in <unistd.h>) and it does not recognize that two uses of _syscallX are to be resolved against kernel headers in the source tree, not against _syscallX; they in fact do not compile and would not work anyway. If _syscallX macros will be removed from the kernel tree altogether, the only reasonable solution for that piece of code is switching to open-coded inline assembly (it's remapping the whole executable from memory, except the page containing this code). Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/sys-x86_64')
-rw-r--r--arch/um/sys-x86_64/unmap.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/um/sys-x86_64/unmap.c b/arch/um/sys-x86_64/unmap.c
index 57c9286a701b..f4a4bffd8a18 100644
--- a/arch/um/sys-x86_64/unmap.c
+++ b/arch/um/sys-x86_64/unmap.c
@@ -5,17 +5,20 @@
#include <linux/mman.h>
#include <asm/unistd.h>
-#include <sys/syscall.h>
+static int errno;
+
+static inline _syscall2(int,munmap,void *,start,size_t,len)
+static inline _syscall6(void *,mmap,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 (syscall(__NR_munmap, to, size) < 0){
+ if(munmap(to, size) < 0){
return(-1);
}
- if (syscall(__NR_mmap, to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1){
+ if(mmap(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1){
return(-1);
}
- if (syscall(__NR_munmap, from, size) < 0){
+ if(munmap(from, size) < 0){
return(-1);
}
return(0);