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cae734710d
Commit861574d51b("powerpc/uaccess: Implement masked user access") provides optimised user access by avoiding the cost of access_ok(). Convert csum_and_copy_to_user() and csum_and_copy_from_user() to scoped user access to benefit from masked user access. csum_and_copy_to_user() and csum_and_copy_from_user() are only called respectively by csum_and_copy_to_iter() and csum_and_copy_from_iter_full() and they are only called twice. Those functions used to be large but they were first reduced by commitc693cc4676("saner calling conventions for csum_and_copy_..._user()") then commit70d65cd555("ppc: propagate the calling conventions change down to csum_partial_copy_generic()"). With the additional size reduction provided by conversion to scoped user access they are not worth being kept out of line. $ ./scripts/bloat-o-meter vmlinux.0 vmlinux.1 add/remove: 0/2 grow/shrink: 2/0 up/down: 136/-176 (-40) Function old new delta csum_and_copy_to_iter 2416 2488 +72 csum_and_copy_from_iter_full 2272 2336 +64 csum_and_copy_to_user 88 - -88 csum_and_copy_from_user 88 - -88 Total: Before=11514471, After=11514431, chg -0.00% Signed-off-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org> Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Link: https://patch.msgid.link/f44e1b2760dbed35b237040001a91bc8304b726b.1773137098.git.chleroy@kernel.org
81 lines
2.3 KiB
Makefile
81 lines
2.3 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for ppc-specific library files..
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#
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CFLAGS_code-patching.o += -fno-stack-protector
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CFLAGS_feature-fixups.o += -fno-stack-protector
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CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
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CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
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KASAN_SANITIZE_code-patching.o := n
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KASAN_SANITIZE_feature-fixups.o := n
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# restart_table.o contains functions called in the NMI interrupt path
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# which can be in real mode. Disable KASAN.
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KASAN_SANITIZE_restart_table.o := n
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KCSAN_SANITIZE_code-patching.o := n
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KCSAN_SANITIZE_feature-fixups.o := n
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ifdef CONFIG_KASAN
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CFLAGS_code-patching.o += -DDISABLE_BRANCH_PROFILING
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CFLAGS_feature-fixups.o += -DDISABLE_BRANCH_PROFILING
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endif
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CFLAGS_code-patching.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
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CFLAGS_feature-fixups.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
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obj-y += code-patching.o feature-fixups.o pmem.o
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obj-$(CONFIG_CODE_PATCHING_SELFTEST) += test-code-patching.o
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ifndef CONFIG_KASAN
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obj-y += string.o memcmp_$(BITS).o
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obj-$(CONFIG_PPC32) += strlen_32.o
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endif
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obj-$(CONFIG_PPC32) += div64.o copy_32.o crtsavres.o
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obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o
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# See corresponding test in arch/powerpc/Makefile
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# 64-bit linker creates .sfpr on demand for final link (vmlinux),
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# so it is only needed for modules, and only for older linkers which
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# do not support --save-restore-funcs
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ifndef CONFIG_LD_IS_BFD
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always-$(CONFIG_PPC64) += crtsavres.o
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endif
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obj-$(CONFIG_PPC_BOOK3S_64) += copyuser_power7.o copypage_power7.o \
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memcpy_power7.o restart_table.o
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obj64-y += copypage_64.o copyuser_64.o mem_64.o hweight_64.o \
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memcpy_64.o copy_mc_64.o
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ifdef CONFIG_PPC_QUEUED_SPINLOCKS
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obj-$(CONFIG_SMP) += qspinlock.o
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else
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obj64-$(CONFIG_SMP) += locks.o
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endif
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obj64-$(CONFIG_ALTIVEC) += vmx-helper.o
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obj64-$(CONFIG_KPROBES_SANITY_TEST) += test_emulate_step.o \
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test_emulate_step_exec_instr.o
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obj-y += checksum_$(BITS).o string_$(BITS).o
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obj-y += sstep.o
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obj-$(CONFIG_PPC_FPU) += ldstfp.o
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obj64-y += quad.o
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obj-$(CONFIG_PPC_LIB_RHEAP) += rheap.o
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obj-$(CONFIG_FTR_FIXUP_SELFTEST) += feature-fixups-test.o
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obj-$(CONFIG_ALTIVEC) += xor_vmx.o xor_vmx_glue.o
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CFLAGS_xor_vmx.o += -mhard-float -maltivec $(call cc-option,-mabi=altivec)
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# Enable <altivec.h>
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CFLAGS_xor_vmx.o += -isystem $(shell $(CC) -print-file-name=include)
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obj-$(CONFIG_PPC64) += $(obj64-y)
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