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compiler.h: Introduce absolute_pointer macro
[ Upstream commit f6b5f1a569
]
absolute_pointer() disassociates a pointer from its originating symbol
type and context. Use it to prevent compiler warnings/errors such as
drivers/net/ethernet/i825xx/82596.c: In function 'i82596_probe':
arch/m68k/include/asm/string.h:72:25: error:
'__builtin_memcpy' reading 6 bytes from a region of size 0 [-Werror=stringop-overread]
Such warnings may be reported by gcc 11.x for string and memory
operations on fixed addresses.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -180,6 +180,8 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
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(typeof(ptr)) (__ptr + (off)); })
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(typeof(ptr)) (__ptr + (off)); })
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#endif
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#endif
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#define absolute_pointer(val) RELOC_HIDE((void *)(val), 0)
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#ifndef OPTIMIZER_HIDE_VAR
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#ifndef OPTIMIZER_HIDE_VAR
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/* Make the optimizer believe the variable can be manipulated arbitrarily. */
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/* Make the optimizer believe the variable can be manipulated arbitrarily. */
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#define OPTIMIZER_HIDE_VAR(var) \
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#define OPTIMIZER_HIDE_VAR(var) \
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