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| author | Hou Wenlong <houwenlong.hwl@antgroup.com> | 2023-06-09 17:45:32 +0800 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-11-13 12:43:50 +0100 |
| commit | fe22bc430c9d24394e541e16e0941a075f02fcb7 (patch) | |
| tree | 2c63b96515832ce7962ccd7be250c84952e01f6e | |
| parent | 5c22c4726e4a9c6b2e182c0b21c2d3dd63f608c4 (diff) | |
| download | lwn-fe22bc430c9d24394e541e16e0941a075f02fcb7.tar.gz lwn-fe22bc430c9d24394e541e16e0941a075f02fcb7.zip | |
x86/paravirt: Make the struct paravirt_patch_site packed
Similar to struct alt_instr, make the struct paravirt_patch_site packed
and get rid of all the .align directives and save 2 bytes for one
PARA_SITE entry on X86_64.
[ bp: Massage commit message. ]
Suggested-by: Nadav Amit <namit@vmware.com>
Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/6dcb20159ded36586c5f7f2ae159e4e030256627.1686301237.git.houwenlong.hwl@antgroup.com
| -rw-r--r-- | arch/x86/include/asm/paravirt.h | 2 | ||||
| -rw-r--r-- | arch/x86/include/asm/paravirt_types.h | 4 |
2 files changed, 1 insertions, 5 deletions
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h index d9384e9d97f6..693c61dbdd9c 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -748,11 +748,9 @@ void native_pv_lock_init(void) __init; ops; \ 772:; \ .pushsection .parainstructions,"a"; \ - .align 4; \ .long 771b-.; \ .byte ptype; \ .byte 772b-771b; \ - .align 4; \ .popsection diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index e1bfb719fca3..f4fb2e3ec7b8 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -8,7 +8,7 @@ struct paravirt_patch_site { s32 instr_offset; /* original instructions */ u8 type; /* type of this instruction */ u8 len; /* length of original instruction */ -}; +} __packed; #endif #ifdef CONFIG_PARAVIRT @@ -263,11 +263,9 @@ extern struct paravirt_patch_template pv_ops; #define _paravirt_alt(insn_string, type) \ "771:\n\t" insn_string "\n" "772:\n" \ ".pushsection .parainstructions,\"a\"\n" \ - " .align 4\n" \ " .long 771b-.\n" \ " .byte " type "\n" \ " .byte 772b-771b\n" \ - " .align 4\n" \ ".popsection\n" /* Generate patchable code, with the default asm parameters. */ |