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nolibc changes for 6.13

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Changes
 -------
 
 * Fix potential error due to missing #include on s390
 * Compatibility with -Wmissing-fallthrough
 * Run qemu with more memory during tests
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Merge tag 'nolibc.2024.11.01a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu

Pull nolibc updates from Paul McKenney:

 - Fix potential error due to missing #include on s390

 - Compatibility with -Wmissing-fallthrough

 - Run qemu with more memory during tests

* tag 'nolibc.2024.11.01a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
  selftests/nolibc: start qemu with 1 GiB of memory
  tools/nolibc: compiler: add macro __nolibc_fallthrough
  tools/nolibc: s390: include std.h
This commit is contained in:
Linus Torvalds 2024-11-19 10:13:53 -08:00
commit 26c9fdd6f3
4 changed files with 11 additions and 3 deletions
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1
tools/include/nolibc/arch-s390.h
View File

@ -10,6 +10,7 @@
#include "compiler.h"
#include "crt.h"
#include "std.h"
/* Syscalls for s390:
* - registers are 64-bit

6
tools/include/nolibc/compiler.h
View File

@ -32,4 +32,10 @@
# define __no_stack_protector __attribute__((__optimize__("-fno-stack-protector")))
#endif /* __nolibc_has_attribute(no_stack_protector) */
#if __nolibc_has_attribute(fallthrough)
# define __nolibc_fallthrough do { } while (0); __attribute__((fallthrough))
#else
# define __nolibc_fallthrough do { } while (0)
#endif /* __nolibc_has_attribute(fallthrough) */
#endif /* _NOLIBC_COMPILER_H */

3
tools/include/nolibc/stdio.h
View File

@ -15,6 +15,7 @@
#include "stdarg.h"
#include "stdlib.h"
#include "string.h"
#include "compiler.h"
#ifndef EOF
#define EOF (-1)
@ -264,7 +265,7 @@ int vfprintf(FILE *stream, const char *fmt, va_list args)
case 'p':
*(out++) = '0';
*(out++) = 'x';
/* fall through */
__nolibc_fallthrough;
default: /* 'x' and 'p' above */
u64toh_r(v, out);
break;

4
tools/testing/selftests/nolibc/Makefile
View File

@ -130,9 +130,9 @@ QEMU_ARGS_ppc = -M g3beige -append "console=ttyS0 panic=-1 $(TEST:%=NOLIB
QEMU_ARGS_ppc64 = -M powernv -append "console=hvc0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_ppc64le = -M powernv -append "console=hvc0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_riscv = -M virt -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_s390 = -M s390-ccw-virtio -m 1G -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_s390 = -M s390-ccw-virtio -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_loongarch = -M virt -append "console=ttyS0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS = $(QEMU_ARGS_$(XARCH)) $(QEMU_ARGS_BIOS) $(QEMU_ARGS_EXTRA)
QEMU_ARGS = -m 1G $(QEMU_ARGS_$(XARCH)) $(QEMU_ARGS_BIOS) $(QEMU_ARGS_EXTRA)
# OUTPUT is only set when run from the main makefile, otherwise
# it defaults to this nolibc directory.