Commit ea535e41 authored by Laura Abbott's avatar Laura Abbott Committed by Linus Torvalds

dma-debug: switch check from _text to _stext

In include/asm-generic/sections.h:

   * Usage guidelines:
   * _text, _data: architecture specific, don't use them in
   * arch-independent code
   * [_stext, _etext]: contains .text.* sections, may also contain
   * .rodata.*
   *                   and/or .init.* sections

_text is not guaranteed across architectures.  Architectures such as ARM
may reuse parts which are not actually text and erroneously trigger a bug.
Switch to using _stext which is guaranteed to contain text sections.

Came out of<>
Signed-off-by: default avatarLaura Abbott <>
Reviewed-by: default avatarKees Cook <>
Cc: Russell King <>
Cc: Arnd Bergmann <>
Cc: <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 601f1db6
......@@ -1181,7 +1181,7 @@ static inline bool overlap(void *addr, unsigned long len, void *start, void *end
static void check_for_illegal_area(struct device *dev, void *addr, unsigned long len)
if (overlap(addr, len, _text, _etext) ||
if (overlap(addr, len, _stext, _etext) ||
overlap(addr, len, __start_rodata, __end_rodata))
err_printk(dev, NULL, "DMA-API: device driver maps memory from kernel text or rodata [addr=%p] [len=%lu]\n", addr, len);
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