[tip: x86/fpu] x86/fpu: Remove unused get_xsave_field_ptr()

[tip-bot2 for Thomas Gleixner]

The following commit has been merged into the x86/fpu branch of tip:

Commit-ID:     4098b3eef37be19572d270f9b761c3e8ffcf37ac
Gitweb:        https://git.kernel.org/tip/4098b3eef37be19572d270f9b761c3e8ffcf37ac
Author:        Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate:    Wed, 23 Jun 2021 14:01:33 +02:00
Committer:     Borislav Petkov <bp@xxxxxxx>
CommitterDate: Wed, 23 Jun 2021 17:49:46 +02:00

x86/fpu: Remove unused get_xsave_field_ptr()

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Reviewed-by: Andy Lutomirski <luto@xxxxxxxxxx>
Reviewed-by: Borislav Petkov <bp@xxxxxxx>
Link: https://lkml.kernel.org/r/20210623121451.915614415@xxxxxxxxxxxxx
---
 arch/x86/include/asm/fpu/xstate.h |  1 +-
 arch/x86/kernel/fpu/xstate.c      | 30 +------------------------------
 2 files changed, 31 deletions(-)

diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h
index 47a9223..d22e973 100644
--- a/arch/x86/include/asm/fpu/xstate.h
+++ b/arch/x86/include/asm/fpu/xstate.h
@@ -101,7 +101,6 @@ extern void __init update_regset_xstate_info(unsigned int size,
 					     u64 xstate_mask);
 
 void *get_xsave_addr(struct xregs_state *xsave, int xfeature_nr);
-const void *get_xsave_field_ptr(int xfeature_nr);
 int using_compacted_format(void);
 int xfeature_size(int xfeature_nr);
 struct membuf;
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index 5e825ff..b82879c 100644
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -998,36 +998,6 @@ void *get_xsave_addr(struct xregs_state *xsave, int xfeature_nr)
 }
 EXPORT_SYMBOL_GPL(get_xsave_addr);
 
-/*
- * This wraps up the common operations that need to occur when retrieving
- * data from xsave state.  It first ensures that the current task was
- * using the FPU and retrieves the data in to a buffer.  It then calculates
- * the offset of the requested field in the buffer.
- *
- * This function is safe to call whether the FPU is in use or not.
- *
- * Note that this only works on the current task.
- *
- * Inputs:
- *	@xfeature_nr: state which is defined in xsave.h (e.g. XFEATURE_FP,
- *	XFEATURE_SSE, etc...)
- * Output:
- *	address of the state in the xsave area or NULL if the state
- *	is not present or is in its 'init state'.
- */
-const void *get_xsave_field_ptr(int xfeature_nr)
-{
-	struct fpu *fpu = &current->thread.fpu;
-
-	/*
-	 * fpu__save() takes the CPU's xstate registers
-	 * and saves them off to the 'fpu memory buffer.
-	 */
-	fpu__save(fpu);
-
-	return get_xsave_addr(&fpu->state.xsave, xfeature_nr);
-}
-
 #ifdef CONFIG_ARCH_HAS_PKEYS
 
 /*