diff options
| author | Jeff Dike <jdike@addtoit.com> | 2005-11-21 21:32:10 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-22 09:13:41 -0800 |
| commit | aa1a64ee12ae130706f3fc0007841ce9b0ddf9c2 (patch) | |
| tree | aa4dcbb8d1870209ae69dc85f241b8c1592ee4c1 /arch | |
| parent | 17d469715c6453e4994e6617e8f644bf10f38584 (diff) | |
| download | lwn-aa1a64ee12ae130706f3fc0007841ce9b0ddf9c2.tar.gz lwn-aa1a64ee12ae130706f3fc0007841ce9b0ddf9c2.zip | |
[PATCH] uml: eliminate use of libc PAGE_SIZE
On some systems, libc PAGE_SIZE calls getpagesize, which can't happen from a
stub. So, I use UM_KERN_PAGE_SIZE, which is less variable in its definition,
instead.
Signed-off-by: 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')
| -rw-r--r-- | arch/um/kernel/skas/clone.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/um/kernel/skas/clone.c b/arch/um/kernel/skas/clone.c index 39c0d7145d31..cb37ce9124a6 100644 --- a/arch/um/kernel/skas/clone.c +++ b/arch/um/kernel/skas/clone.c @@ -9,9 +9,13 @@ #include "stub-data.h" #include "uml-config.h" #include "sysdep/stub.h" +#include "kern_constants.h" /* This is in a separate file because it needs to be compiled with any * extraneous gcc flags (-pg, -fprofile-arcs, -ftest-coverage) disabled + * + * Use UM_KERN_PAGE_SIZE instead of PAGE_SIZE because that calls getpagesize + * on some systems. */ #define STUB_DATA(field) (((struct stub_data *) UML_CONFIG_STUB_DATA)->field) @@ -22,7 +26,7 @@ stub_clone_handler(void) long err; err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD, - UML_CONFIG_STUB_DATA + PAGE_SIZE / 2 - + UML_CONFIG_STUB_DATA + UM_KERN_PAGE_SIZE / 2 - sizeof(void *)); if(err != 0) goto out; @@ -36,9 +40,10 @@ stub_clone_handler(void) if(err) goto out; - err = stub_syscall6(STUB_MMAP_NR, UML_CONFIG_STUB_DATA, PAGE_SIZE, - PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, - STUB_DATA(fd), STUB_DATA(offset)); + err = stub_syscall6(STUB_MMAP_NR, UML_CONFIG_STUB_DATA, + UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE, + MAP_FIXED | MAP_SHARED, STUB_DATA(fd), + STUB_DATA(offset)); out: /* save current result. Parent: pid; child: retcode of mmap */ STUB_DATA(err) = err; |