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Commit d4d35854 authored by Chuck Ebbert's avatar Chuck Ebbert Committed by Andi Kleen
Browse files

[PATCH] remove lock prefix from is_at_popf() tests 



The lock prefix will cause an exception when used with the
popf instruction, so no need to continue searching after it's
found.

Signed-off-by: default avatarChuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
parent 145106e8

arch/x86_64/kernel/ptrace.c

+2 −2
Original line number Original line Diff line number Diff line
@@ -138,7 +138,7 @@ static int is_at_popf(struct task_struct *child, struct pt_regs *regs) 
		case 0x26: case 0x2e:

		case 0x26: case 0x2e:

		case 0x36: case 0x3e:

		case 0x36: case 0x3e:

		case 0x64: case 0x65:

		case 0x64: case 0x65:

		case 0xf0: case 0xf2: case 0xf3:

		case 0xf2: case 0xf3:

			continue;

			continue;





		case 0x40 ... 0x4f:

		case 0x40 ... 0x4f:
@@ -148,7 +148,7 @@ static int is_at_popf(struct task_struct *child, struct pt_regs *regs) 
			/* 64-bit mode: REX prefix */

			/* 64-bit mode: REX prefix */

			continue;

			continue;





			/* CHECKME: f0, f2, f3 */

			/* CHECKME: f2, f3 */





		/*

		/*

		 * pushf: NOTE! We should probably not let

		 * pushf: NOTE! We should probably not let