+ selftests-x86-fix-how-check_ccsh-is-being-invoked.patch added to -mm tree

+ selftests-x86-fix-how-check_ccsh-is-being-invoked.patch added to -mm tree

[Andrew Morton]

The patch titled
     Subject: selftests, x86: fix how check_cc.sh is being invoked
has been added to the -mm tree.  Its filename is
     selftests-x86-fix-how-check_ccsh-is-being-invoked.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/selftests-x86-fix-how-check_ccsh-is-being-invoked.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/selftests-x86-fix-how-check_ccsh-is-being-invoked.patch

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------------------------------------------------------
From: Guillaume Tucker <guillaume.tucker@collabora.com>
Subject: selftests, x86: fix how check_cc.sh is being invoked

The $(CC) variable used in Makefiles could contain several arguments such
as "ccache gcc".  These need to be passed as a single string to
check_cc.sh, otherwise only the first argument will be used as the
compiler command.  Without quotes, the $(CC) variable is passed as
distinct arguments which causes the script to fail to build trivial
programs.

Fix this by adding quotes around $(CC) when calling check_cc.sh to pass
the whole string as a single argument to the script even if it has several
words such as "ccache gcc".

Link: https://lkml.kernel.org/r/d0d460d7be0107a69e3c52477761a6fe694c1840.1646991629.git.guillaume.tucker@collabora.com
Fixes: e9886ace222e ("selftests, x86: Rework x86 target architecture detection")
Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>
Tested-by: "kernelci.org bot" <bot@kernelci.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/vm/Makefile  |    6 +++---
 tools/testing/selftests/x86/Makefile |    6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

--- a/tools/testing/selftests/vm/Makefile~selftests-x86-fix-how-check_ccsh-is-being-invoked
+++ a/tools/testing/selftests/vm/Makefile
@@ -51,9 +51,9 @@ TEST_GEN_FILES += split_huge_page_test
 TEST_GEN_FILES += ksm_tests
 
 ifeq ($(MACHINE),x86_64)
-CAN_BUILD_I386 := $(shell ./../x86/check_cc.sh $(CC) ../x86/trivial_32bit_program.c -m32)
-CAN_BUILD_X86_64 := $(shell ./../x86/check_cc.sh $(CC) ../x86/trivial_64bit_program.c)
-CAN_BUILD_WITH_NOPIE := $(shell ./../x86/check_cc.sh $(CC) ../x86/trivial_program.c -no-pie)
+CAN_BUILD_I386 := $(shell ./../x86/check_cc.sh "$(CC)" ../x86/trivial_32bit_program.c -m32)
+CAN_BUILD_X86_64 := $(shell ./../x86/check_cc.sh "$(CC)" ../x86/trivial_64bit_program.c)
+CAN_BUILD_WITH_NOPIE := $(shell ./../x86/check_cc.sh "$(CC)" ../x86/trivial_program.c -no-pie)
 
 TARGETS := protection_keys
 BINARIES_32 := $(TARGETS:%=%_32)
--- a/tools/testing/selftests/x86/Makefile~selftests-x86-fix-how-check_ccsh-is-being-invoked
+++ a/tools/testing/selftests/x86/Makefile
@@ -6,9 +6,9 @@ include ../lib.mk
 .PHONY: all all_32 all_64 warn_32bit_failure clean
 
 UNAME_M := $(shell uname -m)
-CAN_BUILD_I386 := $(shell ./check_cc.sh $(CC) trivial_32bit_program.c -m32)
-CAN_BUILD_X86_64 := $(shell ./check_cc.sh $(CC) trivial_64bit_program.c)
-CAN_BUILD_WITH_NOPIE := $(shell ./check_cc.sh $(CC) trivial_program.c -no-pie)
+CAN_BUILD_I386 := $(shell ./check_cc.sh "$(CC)" trivial_32bit_program.c -m32)
+CAN_BUILD_X86_64 := $(shell ./check_cc.sh "$(CC)" trivial_64bit_program.c)
+CAN_BUILD_WITH_NOPIE := $(shell ./check_cc.sh "$(CC)" trivial_program.c -no-pie)
 
 TARGETS_C_BOTHBITS := single_step_syscall sysret_ss_attrs syscall_nt test_mremap_vdso \
 			check_initial_reg_state sigreturn iopl ioperm \
_

Patches currently in -mm which might be from guillaume.tucker@collabora.com are

selftests-x86-fix-how-check_ccsh-is-being-invoked.patch