Before:
5 master
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4 7 my-feature HEAD
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3 6
|/
2
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1
Action:
git rebase
After:
7 my-feature HEAD
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6
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5 master
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4
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3
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2
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1
Ready to push with linear history!
Pull request Updated 2025-07-16
The heart/main innovation of GitHub!
Before
7 my-feature HEAD
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6
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5 master
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4
|
3
|
2
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1
Oh, commit 6 was just a temporary step, should be put together with commit 7:
git rebase -i HEAD~2
Mark 6 to be squashed.
After:
67 my-feature HEAD
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5 master
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4
|
3
|
2
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1
Better now, ready to push.
Saturn Updated 2025-07-16
Silicon photomultiplier Updated 2025-07-16
Here is a vendor showcasing their device. They claim in that video that a single photon is produced and detected:
In v4.2, look under arch/x86/:
  • include/asm/pgtable*
  • include/asm/page*
  • mm/pgtable*
  • mm/page*
There seems to be no structs defined to represent the pages, only macros: include/asm/page_types.h is specially interesting. Excerpt:
#define _PAGE_BIT_PRESENT   0   /* is present */
#define _PAGE_BIT_RW        1   /* writeable */
#define _PAGE_BIT_USER      2   /* userspace addressable */
#define _PAGE_BIT_PWT       3   /* page write through */
arch/x86/include/uapi/asm/processor-flags.h defines CR0, and in particular the PG bit position:
#define X86_CR0_PG_BIT      31 /* Paging */
Canvas (Oxford) Updated 2025-07-16
E-learning system of the University of Oxford. Closed by default to non-students of course. It might not be possible at all to publish things publicly?
WebLearn was closed in 2023 in favour of Canvas.

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