# git rev-parse -q --verify a970174d7a1010cb29a5b0c9fa0626abdefcfcbe^{commit}
a970174d7a1010cb29a5b0c9fa0626abdefcfcbe
already have revision, skipping fetch
# git checkout -q -f -B kisskb a970174d7a1010cb29a5b0c9fa0626abdefcfcbe
# git clean -qxdf
# < git log -1
# commit a970174d7a1010cb29a5b0c9fa0626abdefcfcbe
# Author: Steven Rostedt (Google) <rostedt@goodmis.org>
# Date:   Mon Oct 24 11:45:36 2022 -0400
# 
#     x86/mm: Do not verify W^X at boot up
#     
#     Adding on the kernel command line "ftrace=function" triggered:
#     
#       CPA detected W^X violation: 8000000000000063 -> 0000000000000063 range: 0xffffffffc0013000 - 0xffffffffc0013fff PFN 10031b
#       WARNING: CPU: 0 PID: 0 at arch/x86/mm/pat/set_memory.c:609
#       verify_rwx+0x61/0x6d
#       Call Trace:
#          __change_page_attr_set_clr+0x146/0x8a6
#          change_page_attr_set_clr+0x135/0x268
#          change_page_attr_clear.constprop.0+0x16/0x1c
#          set_memory_x+0x2c/0x32
#          arch_ftrace_update_trampoline+0x218/0x2db
#          ftrace_update_trampoline+0x16/0xa1
#          __register_ftrace_function+0x93/0xb2
#          ftrace_startup+0x21/0xf0
#          register_ftrace_function_nolock+0x26/0x40
#          register_ftrace_function+0x4e/0x143
#          function_trace_init+0x7d/0xc3
#          tracer_init+0x23/0x2c
#          tracing_set_tracer+0x1d5/0x206
#          register_tracer+0x1c0/0x1e4
#          init_function_trace+0x90/0x96
#          early_trace_init+0x25c/0x352
#          start_kernel+0x424/0x6e4
#          x86_64_start_reservations+0x24/0x2a
#          x86_64_start_kernel+0x8c/0x95
#          secondary_startup_64_no_verify+0xe0/0xeb
#     
#     This is because at boot up, kernel text is writable, and there's no
#     reason to do tricks to updated it.  But the verifier does not
#     distinguish updates at boot up and at run time, and causes a warning at
#     time of boot.
#     
#     Add a check for system_state == SYSTEM_BOOTING and allow it if that is
#     the case.
#     
#     [ These SYSTEM_BOOTING special cases are all pretty horrid, but the x86
#       text_poke() code does some odd things at bootup, forcing this for now
#         - Linus ]
#     
#     Link: https://lore.kernel.org/r/20221024112730.180916b3@gandalf.local.home
#     Fixes: 652c5bf380ad0 ("x86/mm: Refuse W^X violations")
#     Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sh4-linux/bin/sh4-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sh4-linux/bin/sh4-linux-ld --version
# < git log --format=%s --max-count=1 a970174d7a1010cb29a5b0c9fa0626abdefcfcbe
# < make -s -j 160 ARCH=sh O=/kisskb/build/linus_se7619_defconfig_sh4-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sh4-linux/bin/sh4-linux-  se7619_defconfig
# < make -s -j 160 ARCH=sh O=/kisskb/build/linus_se7619_defconfig_sh4-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sh4-linux/bin/sh4-linux-  help
# make -s -j 160 ARCH=sh O=/kisskb/build/linus_se7619_defconfig_sh4-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sh4-linux/bin/sh4-linux-  olddefconfig
# make -s -j 160 ARCH=sh O=/kisskb/build/linus_se7619_defconfig_sh4-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/sh4-linux/bin/sh4-linux-  
  Generating include/generated/machtypes.h
<stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp]
In file included from /kisskb/src/arch/sh/include/asm/hw_irq.h:6,
                 from /kisskb/src/include/linux/irq.h:596,
                 from /kisskb/src/include/asm-generic/hardirq.h:17,
                 from /kisskb/src/arch/sh/include/asm/hardirq.h:9,
                 from /kisskb/src/include/linux/hardirq.h:11,
                 from /kisskb/src/include/linux/interrupt.h:11,
                 from /kisskb/src/include/linux/serial_core.h:13,
                 from /kisskb/src/include/linux/serial_sci.h:6,
                 from /kisskb/src/arch/sh/kernel/cpu/sh2/setup-sh7619.c:11:
/kisskb/src/include/linux/sh_intc.h:100:63: warning: division 'sizeof (void *) / sizeof (void)' does not compute the number of array elements [-Wsizeof-pointer-div]
  100 | #define _INTC_ARRAY(a) a, __same_type(a, NULL) ? 0 : sizeof(a)/sizeof(*a)
      |                                                               ^
/kisskb/src/include/linux/sh_intc.h:105:31: note: in expansion of macro '_INTC_ARRAY'
  105 |         _INTC_ARRAY(vectors), _INTC_ARRAY(groups),      \
      |                               ^~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:124:15: note: in expansion of macro 'INTC_HW_DESC'
  124 |         .hw = INTC_HW_DESC(vectors, groups, mask_regs,                  \
      |               ^~~~~~~~~~~~
/kisskb/src/arch/sh/kernel/cpu/sh2/setup-sh7619.c:58:8: note: in expansion of macro 'DECLARE_INTC_DESC'
   58 | static DECLARE_INTC_DESC(intc_desc, "sh7619", vectors, NULL,
      |        ^~~~~~~~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:100:63: warning: division 'sizeof (void *) / sizeof (void)' does not compute the number of array elements [-Wsizeof-pointer-div]
  100 | #define _INTC_ARRAY(a) a, __same_type(a, NULL) ? 0 : sizeof(a)/sizeof(*a)
      |                                                               ^
/kisskb/src/include/linux/sh_intc.h:106:9: note: in expansion of macro '_INTC_ARRAY'
  106 |         _INTC_ARRAY(mask_regs), _INTC_ARRAY(prio_regs), \
      |         ^~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:124:15: note: in expansion of macro 'INTC_HW_DESC'
  124 |         .hw = INTC_HW_DESC(vectors, groups, mask_regs,                  \
      |               ^~~~~~~~~~~~
/kisskb/src/arch/sh/kernel/cpu/sh2/setup-sh7619.c:58:8: note: in expansion of macro 'DECLARE_INTC_DESC'
   58 | static DECLARE_INTC_DESC(intc_desc, "sh7619", vectors, NULL,
      |        ^~~~~~~~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:100:63: warning: division 'sizeof (void *) / sizeof (void)' does not compute the number of array elements [-Wsizeof-pointer-div]
  100 | #define _INTC_ARRAY(a) a, __same_type(a, NULL) ? 0 : sizeof(a)/sizeof(*a)
      |                                                               ^
/kisskb/src/include/linux/sh_intc.h:107:9: note: in expansion of macro '_INTC_ARRAY'
  107 |         _INTC_ARRAY(sense_regs), _INTC_ARRAY(ack_regs), \
      |         ^~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:124:15: note: in expansion of macro 'INTC_HW_DESC'
  124 |         .hw = INTC_HW_DESC(vectors, groups, mask_regs,                  \
      |               ^~~~~~~~~~~~
/kisskb/src/arch/sh/kernel/cpu/sh2/setup-sh7619.c:58:8: note: in expansion of macro 'DECLARE_INTC_DESC'
   58 | static DECLARE_INTC_DESC(intc_desc, "sh7619", vectors, NULL,
      |        ^~~~~~~~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:100:63: warning: division 'sizeof (void *) / sizeof (void)' does not compute the number of array elements [-Wsizeof-pointer-div]
  100 | #define _INTC_ARRAY(a) a, __same_type(a, NULL) ? 0 : sizeof(a)/sizeof(*a)
      |                                                               ^
/kisskb/src/include/linux/sh_intc.h:107:34: note: in expansion of macro '_INTC_ARRAY'
  107 |         _INTC_ARRAY(sense_regs), _INTC_ARRAY(ack_regs), \
      |                                  ^~~~~~~~~~~
/kisskb/src/include/linux/sh_intc.h:124:15: note: in expansion of macro 'INTC_HW_DESC'
  124 |         .hw = INTC_HW_DESC(vectors, groups, mask_regs,                  \
      |               ^~~~~~~~~~~~
/kisskb/src/arch/sh/kernel/cpu/sh2/setup-sh7619.c:58:8: note: in expansion of macro 'DECLARE_INTC_DESC'
   58 | static DECLARE_INTC_DESC(intc_desc, "sh7619", vectors, NULL,
      |        ^~~~~~~~~~~~~~~~~
Completed OK
# rm -rf /kisskb/build/linus_se7619_defconfig_sh4-gcc11
# Build took: 0:00:24.612319