Commit85c7cbd

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misc(kernel): use load fence before swapgs

Avoid potential speculative execution issues with swapgs, such as swapgsbeing speculatively missed.Signed-off-by: Ian Moffett <ian@osmora.org>

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Original file line number	Diff line number	Diff line change
`@@ -39,6 +39,7 @@ interrupt_handler_%1:`
`39`	`39`	`test qword[rsp+16],0x3`
`40`	`40`	`; skip the SWAPGS instruction if CS & 0b11 == 0b00.`
`41`	`41`	`jz .dont_swapgs`
	`42`	`+lfence`
`42`	`43`	`swapgs`
`43`	`44`	`.dont_swapgs:`
`44`	`45`
`@@ -70,6 +71,7 @@ interrupt_handler_%1:`
`70`	`71`	`test qword[rsp+8],0x3`
`71`	`72`	`; skip the SWAPGS instruction if CS & 0b11 == 0b00.`
`72`	`73`	`jz .dont_swapgs_again`
	`74`	`+lfence`
`73`	`75`	`swapgs`
`74`	`76`	`.dont_swapgs_again:`
`75`	`77`

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