riscv: Remove gate area stubs (556024d4) · Commits · 戴 / test

Since commit ("arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area"), which predates riscv's inclusion in Linux by almost three years, the default behavior wrt the gate area is sane. Remove riscv's gate area stubs. Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: linux-riscv@lists.infradead.org Signed-off-by:

Andy Lutomirski <luto@kernel.org> Reviewed-by:

Christoph Hellwig <hch@lst.de> Signed-off-by:

Paul Walmsley <paul.walmsley@sifive.com>

arch/riscv/include/asm/page.h

+0 −4

Original line number	Original line	Diff line number	Diff line
	@@ -115,8 +115,4 @@ extern unsigned long min_low_pfn;
	#include <asm-generic/memory_model.h>		#include <asm-generic/memory_model.h>
	#include <asm-generic/getorder.h>		#include <asm-generic/getorder.h>

	/* vDSO support */
	/* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */
	#define __HAVE_ARCH_GATE_AREA

	#endif /* _ASM_RISCV_PAGE_H */		#endif /* _ASM_RISCV_PAGE_H */

arch/riscv/kernel/vdso.c

+0 −19

Original line number	Original line	Diff line number	Diff line
	@@ -92,22 +92,3 @@ const char arch_vma_name(struct vm_area_struct vma)
	return "[vdso]";		return "[vdso]";
	return NULL;		return NULL;
	}		}

	/*
	* Function stubs to prevent linker errors when AT_SYSINFO_EHDR is defined
	*/

	int in_gate_area_no_mm(unsigned long addr)
	{
	return 0;
	}

	int in_gate_area(struct mm_struct *mm, unsigned long addr)
	{
	return 0;
	}

	struct vm_area_struct get_gate_vma(struct mm_struct mm)
	{
	return NULL;
	}

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