From: Yejune Deng Date: Fri, 22 Jan 2021 07:19:25 +0000 (+0800) Subject: x86/fpu/xstate: Use sizeof() instead of a constant X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=0a74d61c7d842b583f33f74d7a9e93201826f4c5;p=linux.git x86/fpu/xstate: Use sizeof() instead of a constant Use sizeof() instead of a constant in fpstate_sanitize_xstate(). Remove use of the address of the 0th array element of ->st_space and ->xmm_space which is equivalent to the array address itself: No code changed: # arch/x86/kernel/fpu/xstate.o: text data bss dec hex filename 9694 899 4 10597 2965 xstate.o.before 9694 899 4 10597 2965 xstate.o.after md5: 5a43fc70bad8e2a1784f67f01b71aabb xstate.o.before.asm 5a43fc70bad8e2a1784f67f01b71aabb xstate.o.after.asm [ bp: Massage commit message. ] Signed-off-by: Yejune Deng Signed-off-by: Borislav Petkov Link: https://lkml.kernel.org/r/20210122071925.41285-1-yejune.deng@gmail.com --- diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 5d8047441a0aa..683749b80ae28 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -167,14 +167,14 @@ void fpstate_sanitize_xstate(struct fpu *fpu) fx->fop = 0; fx->rip = 0; fx->rdp = 0; - memset(&fx->st_space[0], 0, 128); + memset(fx->st_space, 0, sizeof(fx->st_space)); } /* * SSE is in init state */ if (!(xfeatures & XFEATURE_MASK_SSE)) - memset(&fx->xmm_space[0], 0, 256); + memset(fx->xmm_space, 0, sizeof(fx->xmm_space)); /* * First two features are FPU and SSE, which above we handled