flush_dcache_range(9)

💖 NAME 💖

okay so bestie, this is flush_dcache_range(9) from the Kernel API Manual, and it is literally the function that writes any modified data cache blocks out to memory and invalidates them. 🎀

⚠️ important caveat, no cap: it does not invalidate the corresponding instruction cache blocks. 💅

✨ SYNOPSIS ✨

void flush_dcache_range (unsigned long start , unsigned long stop );

🎀 ARGUMENTS 🎀

• start — the start address, fr fr 🫶
• stop — the stop address, and yes it is exclusive 💀

🦋 SEE ALSO 🦋

• Kernel file ./arch/powerpc/include/asm/cacheflush.h — go peek, iykyk 👑

with love from source/version ./arch/powerpc/include/asm, dated October 2026, aka the lil crew behind flush_dcache_range(9) 💜✨