From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Mon, 4 Aug 2014 13:46:30 +0100 Subject: [PATCH v8 01/10] ARM: use _install_special_mapping for sigpage In-Reply-To: <1407003407-31219-2-git-send-email-nathan_lynch@mentor.com> References: <1407003407-31219-1-git-send-email-nathan_lynch@mentor.com> <1407003407-31219-2-git-send-email-nathan_lynch@mentor.com> Message-ID: <20140804124630.GG15117@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Sat, Aug 02, 2014 at 07:16:38PM +0100, Nathan Lynch wrote: > _install_special_mapping allows the VMA to be identifed in > /proc/pid/maps without the use of arch_vma_name, providing a > slight net reduction in object size: > > text data bss dec hex filename > 2996 96 144 3236 ca4 arch/arm/kernel/process.o (before) > 2956 104 144 3204 c84 arch/arm/kernel/process.o (after) > > Signed-off-by: Nathan Lynch > Reviewed-by: Kees Cook > --- > arch/arm/kernel/process.c | 24 ++++++++++++++++-------- > 1 file changed, 16 insertions(+), 8 deletions(-) > > diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c > index 81ef686a91ca..46fbbb3701a0 100644 > --- a/arch/arm/kernel/process.c > +++ b/arch/arm/kernel/process.c > @@ -472,19 +472,23 @@ int in_gate_area_no_mm(unsigned long addr) > > const char *arch_vma_name(struct vm_area_struct *vma) > { > - return is_gate_vma(vma) ? "[vectors]" : > - (vma->vm_mm && vma->vm_start == vma->vm_mm->context.sigpage) ? > - "[sigpage]" : NULL; > + return is_gate_vma(vma) ? "[vectors]" : NULL; > } Why do you need this function? I just removed it for arm64 and I think x86 has done the same. Will