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| author | Richard Weinberger <richard@nod.at> | 2015-10-26 10:38:27 +0100 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2015-11-06 22:49:11 +0100 |
| commit | 1b2411c283e8e178b1c57d07f7fe082442a0927b (patch) | |
| tree | 0bd1a7bbd2510730f896c48e43b2005fe26d9287 | |
| parent | 246d254f1ab62bc83ac84a8ebd263e5384412ce8 (diff) | |
| download | op-kernel-dev-1b2411c283e8e178b1c57d07f7fe082442a0927b.zip op-kernel-dev-1b2411c283e8e178b1c57d07f7fe082442a0927b.tar.gz | |
um: Simplify STUB_DATA loading
As long STUB_DATA fits into 32bits we can use a plain mov.
If it will grow at some point in future we will switch to movabsq.
In any case the code is smaller and more easy to read
than the current one
Signed-off-by: Richard Weinberger <richard@nod.at>
| -rw-r--r-- | arch/x86/um/stub_64.S | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/x86/um/stub_64.S b/arch/x86/um/stub_64.S index a212445..ba914b3 100644 --- a/arch/x86/um/stub_64.S +++ b/arch/x86/um/stub_64.S @@ -3,10 +3,7 @@ .section .__syscall_stub, "ax" .globl batch_syscall_stub batch_syscall_stub: - mov $(STUB_DATA >> 32), %rbx - sal $32, %rbx - mov $(STUB_DATA & 0xffffffff), %rax - or %rax, %rbx + mov $(STUB_DATA), %rbx /* load pointer to first operation */ mov %rbx, %rsp add $0x10, %rsp |
