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Commit 27510235 authored by Michael Ellerman's avatar Michael Ellerman
Browse files

powerpc/64: Correct comment on LOAD_HANDLER() 



The comment for LOAD_HANDLER() was wrong. The part about kdump has not
been true since 1f6a93e4 ("powerpc: Make it possible to move the
interrupt handlers away from the kernel").

Describe how it currently works, and combine the two separate comments
into one.

Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Reviewed-by: default avatarNick Piggin <npiggin@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent f0f558b1

arch/powerpc/include/asm/exception-64s.h

+4 −4
Original line number Original line Diff line number Diff line
@@ -84,12 +84,12 @@ 




/*

/*

 * We're short on space and time in the exception prolog, so we can't

 * We're short on space and time in the exception prolog, so we can't

 * use the normal SET_REG_IMMEDIATE macro. Normally we just need the

 * use the normal LOAD_REG_IMMEDIATE macro to load the address of label.

 * low halfword of the address, but for Kdump we need the whole low

 * Instead we get the base of the kernel from paca->kernelbase and or in the low

 * word.

 * part of label. This requires that the label be within 64KB of kernelbase, and

 * that kernelbase be 64K aligned.

 */

 */

#define LOAD_HANDLER(reg, label)					\

#define LOAD_HANDLER(reg, label)					\

	/* Handlers must be within 64K of kbase, which must be 64k aligned */ \

	ori	reg,reg,(label)-_stext;	/* virt addr of handler ... */

	ori	reg,reg,(label)-_stext;	/* virt addr of handler ... */





/* Exception register prefixes */

/* Exception register prefixes */