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| author | Johannes Berg <johannes.berg@intel.com> | 2023-04-14 15:46:39 +0200 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2023-04-20 23:08:43 +0200 |
| commit | 6032aca0deb9c138df122192f8ef02de1fdccf25 (patch) | |
| tree | f9acfe2a2c09cfa1b3a86351b8bdf2ccd8fa48ef /arch/um/kernel/skas/clone.c | |
| parent | fc54a4f15988e228cf88f888483e985c5f35031e (diff) | |
| download | linux-6032aca0deb9c138df122192f8ef02de1fdccf25.tar.gz linux-6032aca0deb9c138df122192f8ef02de1fdccf25.tar.bz2 linux-6032aca0deb9c138df122192f8ef02de1fdccf25.zip | |
um: make stub data pages size tweakable
There's a lot of code here that hard-codes that the
data is a single page, and right now that seems to
be sufficient, but to make it easier to change this
in the future, add a new STUB_DATA_PAGES constant
and use it throughout the code.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/kernel/skas/clone.c')
| -rw-r--r-- | arch/um/kernel/skas/clone.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/um/kernel/skas/clone.c b/arch/um/kernel/skas/clone.c index ff5061f29167..62435187dda4 100644 --- a/arch/um/kernel/skas/clone.c +++ b/arch/um/kernel/skas/clone.c @@ -24,11 +24,12 @@ void __attribute__ ((__section__ (".__syscall_stub"))) stub_clone_handler(void) { - struct stub_data *data = get_stub_page(); + struct stub_data *data = get_stub_data(); long err; err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD, - (unsigned long)data + UM_KERN_PAGE_SIZE / 2); + (unsigned long)data + + STUB_DATA_PAGES * UM_KERN_PAGE_SIZE / 2); if (err) { data->parent_err = err; goto done; |