mirror of https://gitee.com/openkylin/linux.git
736706bee3
Every in-kernel use of this function defined it to KERNEL_DS (either as an actual define, or as an inline function). It's an entirely historical artifact, and long long long ago used to actually read the segment selector valueof '%ds' on x86. Which in the kernel is always KERNEL_DS. Inspired by a patch from Jann Horn that just did this for a very small subset of users (the ones in fs/), along with Al who suggested a script. I then just took it to the logical extreme and removed all the remaining gunk. Roughly scripted with git grep -l '(get_ds())' -- :^tools/ | xargs sed -i 's/(get_ds())/(KERNEL_DS)/' git grep -lw 'get_ds' -- :^tools/ | xargs sed -i '/^#define get_ds()/d' plus manual fixups to remove a few unusual usage patterns, the couple of inline function cases and to fix up a comment that had become stale. The 'get_ds()' function remains in an x86 kvm selftest, since in user space it actually does something relevant. Inspired-by: Jann Horn <jannh@google.com> Inspired-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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| .. | ||
| Kbuild | ||
| assembler.h | ||
| barrier.h | ||
| bitfield.h | ||
| cache.h | ||
| cache_info.h | ||
| cacheflush.h | ||
| current.h | ||
| delay.h | ||
| elf.h | ||
| fixmap.h | ||
| fpu.h | ||
| fpuemu.h | ||
| ftrace.h | ||
| futex.h | ||
| highmem.h | ||
| io.h | ||
| irqflags.h | ||
| l2_cache.h | ||
| linkage.h | ||
| memory.h | ||
| mmu.h | ||
| mmu_context.h | ||
| module.h | ||
| nds32.h | ||
| nds32_fpu_inst.h | ||
| page.h | ||
| perf_event.h | ||
| pgalloc.h | ||
| pgtable.h | ||
| pmu.h | ||
| proc-fns.h | ||
| processor.h | ||
| ptrace.h | ||
| sfp-machine.h | ||
| shmparam.h | ||
| stacktrace.h | ||
| string.h | ||
| suspend.h | ||
| swab.h | ||
| syscall.h | ||
| syscalls.h | ||
| thread_info.h | ||
| tlb.h | ||
| tlbflush.h | ||
| uaccess.h | ||
| unistd.h | ||
| vdso.h | ||
| vdso_datapage.h | ||
| vdso_timer_info.h | ||