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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
9429ec96c2
The userspace part of UML uses the asm-offsets.h generator mechanism to
create definitions for UM_KERN_<LEVEL> that match the in-kernel
KERN_<LEVEL> constant definitions.
As of commit 04d2c8c83d ("printk: convert
the format for KERN_<LEVEL> to a 2 byte pattern"), KERN_<LEVEL> is no
longer expanded to the literal '"<LEVEL>"', but to '"\001" "LEVEL"', i.e.
it contains two parts.
However, the combo of DEFINE_STR() in
arch/x86/um/shared/sysdep/kernel-offsets.h and sed-y in Kbuild doesn't
support string literals consisting of multiple parts. Hence for all
UM_KERN_<LEVEL> definitions, only the SOH character is retained in the actual
definition, while the remainder ends up in the comment. E.g. in
include/generated/asm-offsets.h we get
#define UM_KERN_INFO "\001" /* "6" KERN_INFO */
instead of
#define UM_KERN_INFO "\001" "6" /* KERN_INFO */
This causes spurious '^A' output in some kernel messages:
Calibrating delay loop... 4640.76 BogoMIPS (lpj=23203840)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 256
^AChecking that host ptys support output SIGIO...Yes
^AChecking that host ptys support SIGIO on close...No, enabling workaround
^AUsing 2.6 host AIO
NET: Registered protocol family 16
bio: create slab <bio-0> at 0
Switching to clocksource itimer
To fix this:
- Move the mapping from UM_KERN_<LEVEL> to KERN_<LEVEL> from
arch/um/include/shared/common-offsets.h to
arch/um/include/shared/user.h, which is preincluded for all userspace
parts,
- Preinclude include/linux/kern_levels.h for all userspace parts, to
obtain the in-kernel KERN_<LEVEL> constant definitions. This doesn't
violate the kernel/userspace separation, as include/linux/kern_levels.h
is self-contained and doesn't expose any other kernel internals.
- Remove the now unused STR() and DEFINE_STR() macros.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
42 lines
1011 B
C
42 lines
1011 B
C
/* for use by sys-$SUBARCH/kernel-offsets.c */
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DEFINE(KERNEL_MADV_REMOVE, MADV_REMOVE);
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DEFINE(UM_KERN_PAGE_SIZE, PAGE_SIZE);
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DEFINE(UM_KERN_PAGE_MASK, PAGE_MASK);
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DEFINE(UM_KERN_PAGE_SHIFT, PAGE_SHIFT);
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DEFINE(UM_NSEC_PER_SEC, NSEC_PER_SEC);
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DEFINE(UM_ELF_CLASS, ELF_CLASS);
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DEFINE(UM_ELFCLASS32, ELFCLASS32);
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DEFINE(UM_ELFCLASS64, ELFCLASS64);
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DEFINE(UM_NR_CPUS, NR_CPUS);
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DEFINE(UM_GFP_KERNEL, GFP_KERNEL);
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DEFINE(UM_GFP_ATOMIC, GFP_ATOMIC);
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/* For crypto assembler code. */
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DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
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DEFINE(UM_THREAD_SIZE, THREAD_SIZE);
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DEFINE(UM_HZ, HZ);
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DEFINE(UM_USEC_PER_SEC, USEC_PER_SEC);
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DEFINE(UM_NSEC_PER_SEC, NSEC_PER_SEC);
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DEFINE(UM_NSEC_PER_USEC, NSEC_PER_USEC);
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#ifdef CONFIG_PRINTK
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DEFINE(UML_CONFIG_PRINTK, CONFIG_PRINTK);
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#endif
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#ifdef CONFIG_NO_HZ
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DEFINE(UML_CONFIG_NO_HZ, CONFIG_NO_HZ);
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#endif
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#ifdef CONFIG_UML_X86
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DEFINE(UML_CONFIG_UML_X86, CONFIG_UML_X86);
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#endif
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#ifdef CONFIG_64BIT
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DEFINE(UML_CONFIG_64BIT, CONFIG_64BIT);
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#endif
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