sparc: Fix -Wstringop-overflow warning
Greetings, GCC 7 introduced the -Wstringop-overflow flag to detect buffer overflows in calls to string handling functions [1][2]. Due to the way ``empty_zero_page'' is declared in arch/sparc/include/setup.h, this causes a warning to trigger at compile time in the function mem_init(), which is subsequently converted to an error. The ensuing patch fixes this issue and aligns the declaration of empty_zero_page to that of other architectures. Thank you. Cheers, Orlando. [1] https://gcc.gnu.org/ml/gcc-patches/2016-10/msg02308.html [2] https://gcc.gnu.org/gcc-7/changes.html Signed-off-by: Orlando Arias <oarias@knights.ucf.edu> -------------------------------------------------------------------------------- Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -91,9 +91,9 @@ extern unsigned long pfn_base;
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* ZERO_PAGE is a global shared page that is always zero: used
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* ZERO_PAGE is a global shared page that is always zero: used
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* for zero-mapped memory areas etc..
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* for zero-mapped memory areas etc..
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*/
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*/
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extern unsigned long empty_zero_page;
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extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
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#define ZERO_PAGE(vaddr) (virt_to_page(&empty_zero_page))
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#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
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/*
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/*
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* In general all page table modifications should use the V8 atomic
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* In general all page table modifications should use the V8 atomic
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@ -16,7 +16,7 @@ extern char reboot_command[];
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*/
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*/
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extern unsigned char boot_cpu_id;
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extern unsigned char boot_cpu_id;
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extern unsigned long empty_zero_page;
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extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
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extern int serial_console;
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extern int serial_console;
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static inline int con_is_present(void)
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static inline int con_is_present(void)
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@ -290,7 +290,7 @@ void __init mem_init(void)
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/* Saves us work later. */
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/* Saves us work later. */
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memset((void *)&empty_zero_page, 0, PAGE_SIZE);
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memset((void *)empty_zero_page, 0, PAGE_SIZE);
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i = last_valid_pfn >> ((20 - PAGE_SHIFT) + 5);
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i = last_valid_pfn >> ((20 - PAGE_SHIFT) + 5);
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i += 1;
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i += 1;
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